Table of contents
How we vet every listicle
Every agency featured on Web Tonic passes our 84-point editorial review before a single listicle goes live. This is how we vet each pick:
Verified client outcomes: We require real case studies with measurable KPIs — revenue, ROAS, CPA, retention — tied to the exact category being ranked. No cherry-picked wins, no unverifiable numbers.
Independent reputation: We cross-check Clutch, Google, G2, and Trustpilot ratings, and screen for review-bombing or suspicious patterns. Only operators with a consistent, verifiable track record make the cut.
Beyond that, every listing goes through a quarterly re-audit. We check 84 criteria across 6 pillars to make sure it still holds up — here are some of the checks we run:
A Conversions API agency sets up server-side tracking, sending purchases, leads and signups from your own server or a Google Tag Manager server container straight to Meta, Google and TikTok, instead of trusting a browser pixel that ad blockers, consent banners and iOS privacy settings routinely block. The work is a server container build, CAPI integrations with event deduplication, and ongoing Event Match Quality tuning. The reason it exists: global iOS tracking opt-in fell to just under 14% by mid-2024.
We compared 20 providers on stack fit, published pricing, disclosed head office and whether they are an agency, a platform or a hosted app. Five publish a starting price; where nobody publishes one, we say so.
Who should implement your Conversions API?
It depends on your stack. Analyzify, Littledata, TrackBee and Attribuly are Shopify-native and cheap to start, Stape hosts the server container, InfoTrust and Bounteous handle enterprise governance, and Web Tonic builds the implementation inside the media account that depends on it.
1. Analyzify
About: Analyzify is a Shopify-focused data and tracking company (legal entity StatsUp LLC / Solverhood OÜ) that connects stores to 10+ marketing platforms with server-side tracking. Its core product enhances GA4, Google Ads, and Meta Conversions API data quality directly inside Shopify, and its team runs the implementation for merchants rather than leaving it self-serve.
Key Services: Server-side tracking setup, Meta Conversions API integration, GA4 & Google Ads server-side tagging, Shopify data layer audits, Consent Mode implementation, Cross-platform data QA
Industries Served: Ecommerce, Fashion & Apparel, Consumer Electronics, Home Goods, Beauty & Personal Care
Notable Clients: Joseph Joseph, Spitfire Audio, Popov Leather, Jens Hansen
Locations: Tallinn, Estonia, Sheridan, Wyoming, USA
Pricing: From USD $109/month (Growth plan), USD $206/month (Pro plan)
Great For: Shopify merchants losing Meta/Google signal to iOS privacy changes, DTC brands needing GA4 and Ads data cleanup, Stores wanting done-for-you server-side tagging
Website: Analyzify
2. Web Tonic
About: Web Tonic implements the Conversions API as part of owning the media it feeds. Server-side containers, event deduplication and match-quality tuning are built by the same team that runs paid social and paid search, so the tracking is judged by whether cost per acquisition improves rather than by whether the events fire. A pure analytics consultancy will out-document us on governance; few of them are accountable for the campaign that consumes the data.
Key Services: Growth Marketing, Paid Social, PPC, Meta Ads, SEO, Google Ads, Snapchat Ads, Amazon Ads, Reddit Ads, TikTok Ads, TikTok Shop, GEO-AEO, Webflow Design, Shopify Design, WordPress Design, UGC, Social Media Management, Pay Per Click Management, Marketing Analytics, Analytics Implementation & CDPs, Performance Branding, Performance 360° Audit, Programmatic Ads, OOH Ads, HR Marketing
Industries Served: eCommerce, SaaS, B2B, Construction Professionals, Home Services, SMEs, Health Spa & Wellness, Retail, Legal & Judicial Services, Food & Beverages, Pets, Fitness, Family & Children, Finance & Insurance, Travel, Non-Profits & Organizations, Furniture & Decoration
Notable Clients: WorldRemit, Jack & Jones, Ardene, L'Oréal, Sendwave, Nestlé, Airbnb. Serve Fortune 500 companies and smaller fast-paced startups.
Locations: HQ in San Francisco with notable offices in New York, Chicago, Miami, Toronto, Montreal, Dubai, Singapore, Sydney and more. Offices on five continents.
Pricing: Starting at USD $3,000 per month. Flexible and scalable plans at any time according to your enterprise needs. Book a call to learn more.
Great For: Mid-market to enterprise-level businesses requiring ongoing, on-tap growth and performance marketing services.
Website: Web Tonic
3. Littledata
About: Littledata is a London-founded revenue-tracking platform built specifically for Shopify and Shopify Plus stores, combining server-side event capture with an analytics data layer. It positions its Conversions API and Event Match Quality tooling as the fix for the accuracy gap between Shopify checkout events and what ad platforms actually receive.
Key Services: Meta & TikTok Conversions API setup, Event Match Quality optimization, GA4 ecommerce tracking, Google Ads enhanced conversions, Subscription revenue tracking, Attribution QA audits
Industries Served: Ecommerce, Subscription/DTC brands, Health & Wellness, Apparel, Consumer Packaged Goods
Notable Clients: Micro Scooters, MADE.COM
Locations: London, United Kingdom
Pricing: From $159/month (Business plan), $792/month (Enterprise plan), plus per-order overage
Great For: Shopify Plus merchants needing accurate server-side revenue data, Subscription DTC brands, Teams reconciling GA4 vs. Shopify checkout numbers
Website: Littledata
4. Stape
About: Stape is a server-side tagging infrastructure provider that hosts Google Tag Manager server containers and ships 'power-ups' for Meta, TikTok, and Google Conversions APIs. Rather than running ad campaigns itself, it gives agencies and in-house teams a managed hosting layer plus done-for-you server GTM templates so they can stand up CAPI integrations without building server infrastructure from scratch.
Key Services: GTM Server container hosting, Meta Conversions API power-up, TikTok Events API power-up, Google Ads server-side conversion tracking, Consent management integration, Server-side debugging tools
Industries Served: Ecommerce, SaaS, Agencies (as an infrastructure partner), Media & Publishing, Travel
Notable Clients: Not publicly named — case studies are anonymised by category
Locations: Dover, Delaware, USA
Pricing: No public rate card; quoted per scope (hosting plans start with a free tier, paid GTM server hosting billed per container)
Great For: Agencies that need GTM server hosting for multiple clients, In-house teams standing up their first server container, Brands wanting a Meta/TikTok CAPI power-up without custom dev
Website: Stape
5. InfoTrust
About: InfoTrust is a Cincinnati-founded digital analytics solutions company specializing in data governance, marketing measurement, and privacy technology. Its measurement practice builds first-party data pipelines and Conversions API integrations for enterprise marketing teams that need to reconcile privacy compliance with ad platform performance.
Key Services: Conversions API implementation, Server-side tagging strategy, First-party data architecture, Privacy & consent technology audits, Google Marketing Platform implementation, Data governance consulting
Industries Served: Enterprise Retail, CPG, Financial Services, Media & Entertainment, B2B Technology
Notable Clients: Not publicly named — case studies are anonymised by category
Locations: Cincinnati, Ohio, USA, Chicago, Illinois, USA, Barcelona, Spain
Pricing: No public rate card; quoted per scope
Great For: Enterprise marketers balancing privacy compliance and measurement, Brands needing a first-party data strategy, not just a CAPI plugin, Companies with in-house dev teams needing an implementation partner
Website: InfoTrust
6. Napkyn
About: Napkyn is an Ottawa-founded Google sales and services partner offering full-stack Google Marketing Platform licensing alongside digital data services. Its team builds first-party data and server-side measurement programs for brands migrating off cookie-dependent tracking, working directly inside clients' Google stack.
Key Services: Server-side GTM implementation, First-party data strategy, Google Ads conversion tracking setup, GA4 migration & configuration, Consent Mode v2 rollout, Measurement audits
Industries Served: Retail, Ecommerce, Financial Services, Travel & Hospitality, B2B SaaS
Notable Clients: Not publicly named — case studies are anonymised by category
Locations: Ottawa, Ontario, Canada
Pricing: No public rate card; quoted per scope
Great For: Brands on the Google Marketing Platform needing server-side setup, Companies migrating from Universal Analytics to GA4 with server tagging, Agencies needing a GMP licensing + measurement partner
Website: Napkyn
7. Cardinal Path
About: Cardinal Path is a digital marketing, analytics, and data science consultancy with offices in New York, Chicago, and Toronto. Its measurement practice implements first-party data pipelines and server-side tagging for large advertisers who need conversion data to survive browser and app-level tracking restrictions.
Key Services: Server-side tagging implementation, First-party data strategy, GA4 & GTM consulting, Conversion tracking audits, Data science & modeling, Google Marketing Platform support
Industries Served: Enterprise Retail, Higher Education, Financial Services, Healthcare, B2B Technology
Notable Clients: Not publicly named — case studies are anonymised by category
Locations: New York, New York, USA, Chicago, Illinois, USA, Toronto, Ontario, Canada
Pricing: No public rate card; quoted per scope
Great For: Enterprise advertisers needing a data science-led measurement partner, Organizations with complex, multi-brand tracking setups, Teams needing GA4/GTM plus statistical modeling
Website: Cardinal Path
8. Adswerve
About: Adswerve is a Denver-headquartered data, media, and technology consultancy and a premier Google Marketing Platform partner. It builds first-party data infrastructure and server-side tagging programs for advertisers whose Meta and Google conversion data has degraded under privacy changes.
Key Services: Server-side tagging strategy, First-party data infrastructure, Google Ads & Meta conversion tracking, GA4 implementation, Consent management setup, Media activation on first-party data
Industries Served: Retail & Ecommerce, Financial Services, Automotive, Travel, B2B Technology
Notable Clients: Not publicly named — case studies are anonymised by category
Locations: Denver, Colorado, USA
Pricing: No public rate card; quoted per scope
Great For: Mid-market to enterprise advertisers needing first-party data infrastructure, Google Marketing Platform customers, Brands rebuilding measurement after iOS/cookie signal loss
Website: Adswerve
9. Bounteous
About: Bounteous is a Chicago-headquartered digital experience and analytics agency operating as a Google, Adobe, and Meta technology partner across roughly a dozen offices. Its measurement practice builds Conversions API and server-side tagging programs as part of broader MarTech and CDP implementations for large brands.
Key Services: Conversions API implementation, Server-side GTM builds, Customer data platform (CDP) integration, GA4 & Adobe Analytics migration, Consent management, Marketing technology audits
Industries Served: Enterprise Retail, Healthcare, Financial Services, Travel & Hospitality, B2B Technology
Notable Clients: Not publicly named — case studies are anonymised by category
Locations: Chicago, Illinois, USA, New York, New York, USA
Pricing: No public rate card; quoted per scope
Great For: Enterprise brands needing CAPI as part of a larger MarTech rebuild, Organizations running CDP + server-side tagging together, Companies on Google or Adobe platform partnerships
Website: Bounteous
10. Disruptive Advertising
About: Disruptive Advertising is a Utah-based performance marketing agency managing Google, Meta, and Amazon ad accounts for mid-market and enterprise clients. Its analytics team sets up Meta Conversions API and server-side tracking as a standard part of onboarding new paid media clients whose signal has degraded from iOS and cookie restrictions.
Key Services: Meta Conversions API setup, Google Ads conversion tracking, Paid social management, Paid search management, Landing page CRO, Attribution reporting
Industries Served: Ecommerce, B2B SaaS, Higher Education, Home Services, Health & Wellness
Notable Clients: Not publicly named — case studies are anonymised by category
Locations: Pleasant Grove, Utah, USA
Pricing: No public rate card; quoted per scope
Great For: Brands wanting CAPI bundled with active paid media management, Mid-market advertisers on Google and Meta simultaneously, Companies needing a no-long-term-contract agency
Website: Disruptive Advertising
11. Northbeam
About: Northbeam is a San Francisco-founded marketing intelligence platform built for DTC and ecommerce brands that need to reconcile Meta, TikTok, and Google reporting with real revenue. Its onboarding team implements Meta CAPI and first-party data pipelines as the data foundation its attribution models run on.
Key Services: Meta Conversions API integration, First-party data pipeline setup, Multi-touch attribution modeling, TikTok & Google conversion tracking, Marketing mix modeling, Server-side event deduplication
Industries Served: DTC & Ecommerce, Subscription Commerce, Beauty & Personal Care, Apparel, Health & Wellness
Notable Clients: Not publicly named — case studies are anonymised by category
Locations: San Francisco, California, USA
Pricing: No public rate card; quoted per scope
Great For: High-spend DTC brands needing CAPI plus attribution modeling, Ecommerce teams reconciling ad platform vs. actual revenue, Brands running Meta, TikTok, and Google simultaneously
Website: Northbeam
12. Analytics Mania
About: Analytics Mania is a Google Tag Manager and Google Analytics consultancy built around independent GTM/GA4 training and hands-on implementation work. Its consulting arm builds server-side GTM containers and Meta/Google Conversions API integrations for clients who find the standard client-side setup insufficient.
Key Services: Server-side GTM setup, Meta & Google Conversions API integration, GA4 configuration, Consent Mode implementation, Custom tracking audits, GTM/GA4 training
Industries Served: Ecommerce, SaaS, Publishing, Agencies (as a subcontracted specialist), B2B Services
Notable Clients: Not publicly named — case studies are anonymised by category
Locations: Remote (no single public HQ address disclosed)
Pricing: No public rate card; quoted per scope
Great For: Agencies needing a subcontracted GTM server-side specialist, In-house marketers wanting a boutique implementation partner, Companies needing both training and hands-on setup
Website: Analytics Mania
13. Cometly
About: Cometly is a Newtown, Pennsylvania-based marketing attribution software company that ties ad spend to actual closed revenue. Its platform is built around server-side event capture and Meta/Google Conversions API delivery, with an onboarding team that configures the integration for each customer rather than leaving it fully self-serve.
Key Services: Meta & Google Conversions API setup, Server-side event tracking, Revenue attribution modeling, CRM-to-ad-platform data sync, Event Match Quality optimization, UTM & campaign tracking audits
Industries Served: DTC & Ecommerce, SaaS, Coaching & Info Products, Home Services, B2B Lead Generation
Notable Clients: Not publicly named — case studies are anonymised by category
Locations: Newtown, Pennsylvania, USA
Pricing: No public rate card; quoted per scope
Great For: Lead-gen and coaching businesses needing CRM-to-CAPI sync, Brands wanting revenue attribution tied to server-side events, Teams frustrated by Meta/Google reporting mismatches
Website: Cometly
14. Tracify
About: Tracify is a Munich-based e-commerce tracking and AI-attribution company (Tracify GmbH) that runs all data processing on its own servers in Munich and Frankfurt to stay fully GDPR-compliant. It combines server-to-server tracking with AI-based identity matching to rebuild the customer journey where client-side pixels and consent restrictions break attribution.
Key Services: Server-to-server tracking, AI-based customer matching, Multi-touch attribution, GDPR-compliant data hosting, Cross-channel budget allocation reporting, New vs. returning customer tracking
Industries Served: Ecommerce, Fashion & Apparel, Consumer Electronics, Beauty, Subscription Commerce
Notable Clients: Bedrop, Duschbrocken, Fenou, Nano, Paperlike, Skinbro, Sperling Bags, T1TAN, Travelcircus, Vitamoment, Zahnheld
Locations: Munich, Germany
Pricing: No public rate card; quoted per scope
Great For: EU brands needing GDPR-hosted server-side tracking, Ecommerce merchants blocked by ITP/ad blockers, Multi-channel advertisers needing AI-matched attribution
Website: Tracify
15. Voy Media
About: Voy Media is a New York-headquartered performance advertising agency running Meta, TikTok, and Google campaigns for DTC and ecommerce brands. Its media buying team implements Meta Conversions API and first-party data feeds as standard practice to protect campaign performance from iOS and browser-level signal loss.
Key Services: Meta Conversions API setup, Paid social management, Paid search management, First-party data integration, Creative testing, Landing page optimization
Industries Served: Ecommerce & DTC, Apparel, Health & Beauty, Consumer Electronics, Subscription Commerce
Notable Clients: Not publicly named — case studies are anonymised by category
Locations: New York, New York, USA, Los Angeles, California, USA, Chicago, Illinois, USA
Pricing: No public rate card; quoted per scope
Great For: DTC brands wanting CAPI bundled with active Meta/TikTok ad management, Ecommerce advertisers scaling multi-city media buys, Brands needing first-party data feeding paid social
Website: Voy Media
16. Tatvic
About: Tatvic is an Ahmedabad, India-headquartered MarTech, analytics, and AI solutions engineering firm with offices across the US, Canada, UAE, and Singapore. Its GTM 360 practice runs dedicated server-side tagging implementations, positioning it as one of the few consultancies with a named 'Server-side Tagging' service line built around GA4, Meta, and Google conversion data.
Key Services: Server-side GTM tagging, GA4 implementation & audit, Universal Analytics to BigQuery migration, Consent management platform integration, Conversion rate optimization, Predictive analytics
Industries Served: Ecommerce, BFSI (Banking, Financial Services, Insurance), Travel, Media & Publishing, B2B SaaS
Notable Clients: Not publicly named — case studies are anonymised by category
Locations: Ahmedabad, Gujarat, India, United States (multiple offices), Dubai, UAE
Pricing: No public rate card; quoted per scope
Great For: Enterprises needing a named server-side tagging service line, Global brands with distributed marketing teams, Companies needing GA4 migration plus server-side tagging together
Website: Tatvic
17. TrackBee
About: TrackBee is a San Francisco-headquartered ad-tracking app built for Shopify stores and the agencies that manage them. It captures every checkout event server-side, enriches it with first-party Shopify data, and forwards complete conversion signals to Meta, Google, TikTok, Pinterest, and GA4 in place of a browser-pixel-only setup.
Key Services: Server-side conversion capture, Meta, Google & TikTok event forwarding, First-party Shopify data enrichment, Cross-platform reporting (AI query interface), One-click Shopify installation, Event deduplication
Industries Served: Ecommerce, DTC Brands, Agencies managing Shopify clients, Subscription Commerce, Apparel
Notable Clients: Not publicly named — case studies are anonymised by category
Locations: San Francisco, California, USA
Pricing: From $79 USD/month (up to $25K tracked monthly revenue), $199 USD/month (up to $100K tracked monthly revenue)
Great For: Shopify stores wanting a one-click server-side install, Agencies managing tracking across multiple Shopify clients, Brands wanting AI-queryable cross-platform reporting
Website: TrackBee
18. Attribuly
About: Attribuly is a Boston-based Shopify and Klaviyo attribution app that uses server-side tracking to recover shoppers missed by browser pixels, turning them into enriched retargeting audiences across Meta, Google, and Klaviyo. It markets itself directly against abandoned-cart revenue loss caused by client-side tracking gaps.
Key Services: Server-side tracking & retargeting, Meta & Google Conversions API delivery, Klaviyo audience enrichment, MCP server for AI-agent data access, Abandoned cart recovery tracking, Shopify checkout event capture
Industries Served: Ecommerce, Shopify Plus Brands, Subscription Commerce, Beauty & Personal Care, Apparel
Notable Clients: Not publicly named — case studies are anonymised by category
Locations: Boston, Massachusetts, USA
Pricing: From $8/month (billed annually at $99), Custom packages from $1,000/month for enterprise
Great For: Shopify + Klaviyo stores wanting server-side retargeting, DTC brands with high abandoned-cart volume, Merchants wanting AI-agent access to tracking data
Website: Attribuly
19. 42 Agency
About: 42 Agency is a Toronto-headquartered B2B SaaS performance marketing agency building demand generation programs across paid media, SEO, and RevOps. Its intel team publishes and implements a dedicated Meta Conversions API playbook aimed at recovering B2B lead signal lost to iOS14 tracking restrictions.
Key Services: Meta Conversions API setup for B2B, Paid media management, Account-based marketing, RevOps & lead tracking, SEO for SaaS, Performance creative
Industries Served: B2B SaaS, Software, Technology Startups, Professional Services, Fintech
Notable Clients: Not publicly named — case studies are anonymised by category
Locations: Toronto, Ontario, Canada
Pricing: No public rate card; quoted per scope
Great For: B2B SaaS companies needing CAPI for lead-gen campaigns, Startups rebuilding demand gen after iOS14 signal loss, Teams needing RevOps and tracking handled together
Website: 42 Agency
20. RedClaw
About: RedClaw is a Taipei-based, compliance-first performance marketing agency specializing in the iGaming and cryptocurrency verticals across Taiwan, Hong Kong, Singapore, and Malaysia. Its media buying service bundles full Meta Conversions API and GTM Server Container tracking setup into every account it manages, citing CAPI as core to surviving high ad-account ban rates in its niche.
Key Services: Meta Conversions API integration, GTM Server Container deployment, Facebook Pixel & GA4 setup, Compliant landing page design, Google Ads management, Account warm-up & compliance SOPs
Industries Served: iGaming, Cryptocurrency, High-risk verticals, Forex & Trading Platforms, Sweepstakes/Social Casino
Notable Clients: Not publicly named — case studies are anonymised by category
Locations: Taipei, Taiwan
Pricing: Management fee tiers from under $3,000/month spend to $20,000+/month; DIY compliance kits from $29
Great For: iGaming and crypto brands needing compliant CAPI tracking, High-risk advertisers with frequent ad account bans, APAC-focused advertisers needing regional compliance
Website: RedClaw
Quick Comparison Table
| Agency | Key Specialty | Starting Price | Best For |
|---|---|---|---|
| 1. Analyzify | Shopify server-side tracking | $109/mo | Shopify DTC brands |
| 2. Web Tonic | Full-Service Performance Marketing | USD $3,000/mo | Mid-market to Enterprise |
| 3. Littledata | Shopify revenue tracking | $159/mo | Shopify Plus subscription brands |
| 4. Stape | GTM server hosting & CAPI | Custom | Agencies hosting server GTM |
| 5. InfoTrust | Data governance & CAPI | Custom | Enterprise privacy-conscious brands |
| 6. Napkyn | GMP server-side measurement | Custom | Google Marketing Platform clients |
| 7. Cardinal Path | Enterprise analytics consulting | Custom | Large multi-brand enterprises |
| 8. Adswerve | First-party data consulting | Custom | GMP enterprise advertisers |
| 9. Bounteous | Enterprise MarTech & CAPI | Custom | Enterprise MarTech programs |
| 10. Disruptive Advertising | Paid media + CAPI setup | Custom | Mid-market paid media advertisers |
| 11. Northbeam | CAPI + attribution modeling | Custom | High-spend DTC ecommerce brands |
| 12. Analytics Mania | GTM server-side consulting | Custom | Agencies needing a tracking subcontractor |
| 13. Cometly | Revenue attribution & CAPI | Custom | Lead-gen & DTC revenue attribution |
| 14. Tracify | GDPR server-to-server tracking | Custom | EU ecommerce brands needing GDPR hosting |
| 15. Voy Media | Performance ads + CAPI | Custom | DTC brands scaling paid social |
| 16. Tatvic | GTM server-side tagging | Custom | Global enterprises needing GA4 + server-side |
| 17. TrackBee | Shopify server-side tracking app | $79/mo | Shopify stores wanting fast setup |
| 18. Attribuly | Shopify + Klaviyo server-side tracking | $8/mo | Shopify + Klaviyo ecommerce brands |
| 19. 42 Agency | B2B SaaS CAPI setup | Custom | B2B SaaS demand generation |
| 20. RedClaw | iGaming/crypto CAPI compliance | Custom | iGaming & crypto advertisers |
Frequently Asked Questions
How do I choose a Conversions API agency?
Start with your stack, because it eliminates most of the list. Shopify stores are served well by app-based providers with published pricing; a custom stack or a multi-brand enterprise needs a consultancy that can build and govern a server container properly. Then ask about deduplication, since a CAPI feed running alongside an unmatched pixel double-counts conversions and quietly corrupts optimisation. Finally, ask what Event Match Quality score they commit to reaching, and how it will be reported to you.
How much does Conversions API implementation cost?
Five of the 19 external providers here publish prices, and they are low: Attribuly from $8 per month, TrackBee from $79, Analyzify from $109 and Littledata from $159. Those are app or platform subscriptions for supported stacks, not custom builds. Consultancy implementations are quoted per scope and typically run from a few thousand dollars for a single-platform setup into five figures for a governed, multi-market build with ongoing maintenance. Budget for maintenance, not just installation.
What is the difference between the pixel, the Conversions API and server-side GTM?
The pixel runs in the visitor's browser and is blocked often. The Conversions API sends the same events from a server, so they survive ad blockers and consent restrictions. Server-side Google Tag Manager is the plumbing many implementations use to collect and forward those events to several platforms at once. Most good setups run pixel and CAPI together with deduplication — Meta itself recommends the pair, stating it helps the delivery system lower cost per result.
How long does implementation take and what improves?
A supported Shopify app install is a day or two; a custom server container build with multi-platform CAPI and deduplication is typically two to six weeks including QA. What improves first is signal volume and match quality, which shows up within days. Improvement in reported cost per acquisition follows once the platform relearns, usually across two to four weeks. One vendor, TrackBee, reports browser-only tracking capturing roughly 40% of conversions against 100% server-side — treat that as a vendor figure, not an independent benchmark.
Do privacy laws make server-side tracking risky?
Server-side tracking does not exempt you from consent. You still need a lawful basis, and consent state must be passed through to the server so blocked users are not tracked anyway — that is exactly what the European providers here, such as Tracify, build around. The regulatory backdrop shifted in 2024 and 2025: Google abandoned third-party cookie deprecation in Chrome and retired the Privacy Sandbox APIs, so the driver for CAPI is now app-level signal loss and consent, not cookies.
Choosing a Conversions API Agency
Let the stack shortlist for you. Shopify on a standard theme is a different problem from a headless build or a multi-brand enterprise, and the providers here are honestly built for one or the other. Naming your platform, your consent tool and your ad channels in the first email removes half the list.
Insist on deduplication and match quality as deliverables. Events firing is not success. Ask for the target Event Match Quality score, how duplicates are prevented across pixel and API, and what the report looks like the month after go-live.
Treat consent as part of the build. Passing consent state server-side is a requirement, not a nice-to-have, and it is where cheap implementations create real legal exposure. Agree who signs off the consent logic before anyone touches the container.
Do not skip the consultation. Ask a shortlisted provider to explain how they would verify your current tracking is under-reporting, and what number they expect to move. If you want the implementation owned by the same team that spends the budget, see our data intelligence work or book a call.
