Companies Using Merge.dev

As of our March 2026 crawl, TechnologyChecker.io tracks 929 domains running Merge, with 929 enriched company profiles, one of the highest enrichment rates in our database. Merge occupies a distinct niche: unified APIs for product integrations, not traditional CDP analytics. This means companies using Merge are building integration infrastructure into their own products, making them a highly specific (and valuable) prospecting target.

Growth Trajectory

Merge went from a single domain in February 2023 to 929 active domains by December 2024, nearly 1,000x in under two years. The inflection point came in October 2023, when detections jumped from 1 to 257 in a single month, coinciding with expanded Unified API capabilities and post-Series B enterprise adoption. Active domains have stabilized in the 800-930 range through early 2025, pointing to a platform moving from hypergrowth to sustained expansion.

Sales Signal: The stabilization around 900 domains means Merge's explosive growth phase is over, but the installed base is high-quality. These are VC-backed SaaS companies with active development teams, not casual adopters. Every domain represents a product team that made a deliberate infrastructure decision.

"A 1,000x growth rate from 1 to 929 domains in two years is remarkable for infrastructure tooling. Unlike consumer products, every Merge domain represents an engineering decision to embed unified APIs into a product."

Customer Profile

63.7% of customers have 50 or fewer employees, and 36.3% were founded in the 2020s. These are young, venture-backed SaaS companies building integration infrastructure early instead of accumulating tech debt. The 2010s cohort (48.7%) adds established scaleups like Monday.com and Gong. The 93.7% privately held ratio is striking but expected. This is a tool for VC-funded B2B companies building customer-facing integrations.

At the enterprise end, S&P Global (10,001+ employees) and Revolut (5,001-10,000) prove Merge isn't limited to startups. Ramp used the platform to build HR integrations for their corporate card product, as documented in Merge's own case studies.

Sales Signal: The 63.7% under-50-employees concentration combined with 93.7% privately held defines your ICP precisely: Series A-C B2B SaaS companies building integrations into their products. These companies are growing fast, spending on infrastructure, and making buying decisions quickly. They don't have long procurement cycles.

Industry and Geographic Concentration

Software Development alone accounts for 45.33% of Merge's customer base. Combined with Technology/Internet (13.51%) and IT Services (5.81%), the tech sector represents 64.65% of all customers. Financial Services (5.73%) is the largest non-tech vertical, driven by fintechs like Revolut and Ramp needing HRIS and accounting integrations. Healthcare (3.93%) is emerging, fueled by Merge's benefits and HRIS API coverage.

Geographically, the US dominates at 67.6%, with the UK (7.5%), Canada (5.1%), and Australia (4.1%) filling out the English-speaking core. 82%+ of the user base comes from English-speaking countries. The French (2.4%) and German (2.1%) presence suggests early European expansion.

Sales Signal: The 45.33% Software Development concentration makes this the most industry-concentrated tool in our database. Unlike horizontal analytics tools, Merge customers self-select by industry. If you sell developer tools, API infrastructure, or B2B SaaS enablement products, Merge detection is one of the strongest intent signals available.

Migration Patterns

Migration volumes are modest given Merge's young age, but directionally positive. 26 companies migrated from Bombora to Merge versus only 6 in the opposite direction. A 4.3:1 gain ratio. Wootric shows 11 gains vs. 1 loss. The small numbers reflect that Merge doesn't compete head-to-head with traditional CDPs. Companies adopting it are usually adding a new capability (unified integration APIs) rather than replacing an existing tool.

Sales Signal: The positive migration ratios confirm Merge is gaining, not losing. But the small absolute numbers mean migration data shouldn't be the primary prospecting signal. Instead, use Merge detection as a technographic filter. These companies are building integrations into their products and are open to infrastructure investments.

"Merge's migration data is small in absolute numbers, but that's because it created a new category. Companies don't switch to Merge from competing CDPs, they adopt it as a net-new integration layer. That's a different kind of buying signal."

Technology Ecosystem

The tech stack defines a highly specific customer archetype. Intercom (86%) and Vanta (71.8%) are near-universal among Merge customers, product-led B2B SaaS companies investing in customer communication and SOC 2 compliance. Stripe (80%) confirms these are monetized products, not internal tools.

The React (79.9%) and Next.js (48.8%) combination signals modern frontend stacks. Google Tag Manager (83.5%) and Google Analytics (80.3%) are standard B2B SaaS companions. Sentry at 51% signals engineering teams that prioritize error monitoring and observability. LinkedIn Insights (46.1%) confirms B2B marketing spend. These companies are selling to other businesses and investing in account-based marketing.

Sales Signal: The Intercom + Vanta + Stripe stack is a fingerprint for well-funded B2B SaaS. If you detect all three alongside Merge, you're looking at a company that's likely raised at least a Series A, has paying customers, takes security compliance seriously, and invests in modern developer tooling. This is one of the most precisely defined ICPs in our database.

G2 Review Signals

Across 263 G2 review mentions, users overwhelmingly praise exceptional customer support (71 mentions), the highest support rating in our tracked CDP category. The main criticism: integration options (11 mentions), suggesting some customers want coverage for platforms Merge doesn't yet support. There's an interesting cross-reference with our tech stack data: the 86% Intercom overlap confirms Merge's customers value responsive vendor relationships, and the G2 support score validates that Merge delivers on that expectation. The integration options concern aligns with Merge's expanding but still incomplete API coverage across 200+ platforms.

Sales Signal: The 71-mention customer support praise is unusually high for infrastructure tooling. Merge customers expect responsive, hands-on vendor relationships. If you're selling to this audience, match that expectation, slow response times or self-serve-only support will lose deals.

Key Takeaways

1. Most precisely defined ICP in our database. 45.33% Software Development, 93.7% privately held, 63.7% under 50 employees. This is VC-backed B2B SaaS, full stop.

2. Tech stack fingerprint is unmistakable. Intercom (86%) + Vanta (71.8%) + Stripe (80%) + React (79.9%) defines a company building a funded, security-compliant product.

3. Growth has stabilized around 900 domains. The hypergrowth phase is over, but every domain represents a deliberate infrastructure investment.

4. US-centric with English-speaking expansion. 67.6% US, 82%+ English-speaking. European presence is early-stage.

5. G2 validates the support-driven buying decision. 71 mentions of exceptional support, highest in the category.

Sales Applications

Outreach template: "We noticed [Company] uses Merge for unified API integrations alongside Intercom and Stripe. As you scale your integration infrastructure, are you evaluating tools to [specific value prop relevant to unified API workflows]?"

Targeting strategy: Filter TechnologyChecker.io data for Merge + Vanta + Stripe overlap, 11-200 employees, US-based, Software Development or Financial Services industry. This gives you funded B2B SaaS companies with security compliance, active payment processing, and integration infrastructure needs, the highest-intent segment.

Competitive angle: Merge customers build integrations into their own products. They're not evaluating Merge against Google Analytics or Segment. They're evaluating it against building integrations in-house. Position your product to complement their build-vs-buy decision, not to replace Merge.

Explore the full list of 929 companies using Merge on TechnologyChecker.io, complete with firmographic enrichment, tech stack data, and migration patterns updated monthly.