By SyncGTM Team · March 11, 2026 · 8 min read
Best Full Contact Alternatives for Identity Resolution in 2026
Full Contact built its reputation on identity resolution, but alternatives now offer broader enrichment alongside identity matching. Here are the platforms worth evaluating.
Full Contact (FullContact) specializes in identity resolution -- matching fragmented identifiers like email, phone, and device ID to build unified profiles. But in 2026, many teams need more than identity matching; they need full CRM data enrichment, workflow automation, and CRM integration.
We compared five Full Contact alternatives that offer identity resolution alongside deeper enrichment and automation capabilities. Here are the best options in 2026.
TL;DR
- SyncGTM ($99/mo) -- Best for waterfall enrichment with built-in identity matching across 50+ providers
- Clearbit (HubSpot) -- Best for real-time company identity resolution within HubSpot
- Clay ($167/mo) -- Best for custom identity and enrichment workflows with 100+ sources
- Apollo.io ($49/mo) -- Best budget alternative with contact matching and outreach
- People Data Labs ($0.01/record) -- Best API-first identity resolution at scale
What We Evaluated
- Identity resolution -- multi-identifier matching, deduplication, profile unification
- Enrichment depth -- data appended beyond identity matching
- Real-time capability -- speed of identity resolution and enrichment
- Integration -- CRM sync, API quality, workflow triggers
- Pricing -- cost compared to Full Contact for similar capabilities
1. SyncGTM — Waterfall enrichment with identity resolution across 50+ providers
SyncGTM — Waterfall enrichment with identity resolution across 50+ providers
SyncGTM handles identity resolution as part of its waterfall enrichment process. By querying 50+ providers for each record, it naturally resolves identities by cross-referencing email, phone, company, and social data across multiple sources.
Unlike Full Contact narrow focus on identity, SyncGTM extends into full enrichment, workflow automation, and CRM sync -- making it a more complete solution for most B2B teams.
Pros
- +Identity matching through 50+ provider waterfall
- +Full enrichment beyond identity resolution
- +Workflow automation and CRM sync
- +AI research agents
- +Free tier available
Cons
- −Not specialized in cross-device identity
- −Newer platform
Best for: Waterfall enrichment with identity resolution across 50+ providers
Pricing: Free tier available. Starter $99/mo. Pro $249/mo. Business $649/mo.
2. Clearbit — Company-level identity resolution within HubSpot
Clearbit — Company-level identity resolution within HubSpot
Clearbit (HubSpot Breeze Intelligence) excels at company identity resolution -- matching IP addresses, domains, and email patterns to company profiles. Its Reveal feature identifies anonymous website visitors by company.
For company-level identity resolution within HubSpot, Clearbit is the natural Full Contact replacement.
Pros
- +IP-to-company identity resolution
- +Real-time company matching
- +Native HubSpot integration
- +Strong firmographic data
Cons
- −Requires HubSpot
- −Limited person-level identity
- −No phone data
- −HubSpot tier pricing
Best for: Company-level identity resolution within HubSpot
Pricing: Included with HubSpot Marketing Hub Professional+.
3. Clay — Custom identity resolution workflows with 100+ sources
Clay — Custom identity resolution workflows with 100+ sources
Clay handles identity resolution through its 100+ enrichment integrations. You can match records across multiple providers, deduplicate based on AI formulas, and merge fragmented profiles in a spreadsheet interface.
For teams that need custom identity matching logic, Clay flexibility exceeds both Full Contact and SyncGTM.
Pros
- +100+ sources for identity matching
- +AI formulas for custom matching logic
- +Deduplication workflows
- +Flexible data merging
Cons
- −$167/mo minimum
- −Credit-based pricing
- −Steep learning curve
- −No CRM features
Best for: Custom identity resolution workflows with 100+ sources
Pricing: Free trial. Launch $167/mo. Growth $446/mo. Enterprise custom.
4. Apollo.io — Budget identity matching with outreach included
Apollo.io — Budget identity matching with outreach included
Apollo provides basic identity matching through its 275M+ contact database. Given an email or LinkedIn URL, Apollo matches and enriches the full contact profile including company data, job title, and social profiles.
Not a dedicated identity tool, but for basic contact matching plus outreach, Apollo delivers strong value.
Pros
- +275M+ contacts for matching
- +Built-in outreach
- +Free tier
- +CRM sync
Cons
- −Basic identity matching only
- −Single source
- −No cross-device resolution
- −Email accuracy issues
Best for: Budget identity matching with outreach included
Pricing: Free (10k credits). Basic $49/mo. Professional $79/mo. Organization $119/mo.
5. People Data Labs — API-first identity resolution at scale
People Data Labs — API-first identity resolution at scale
People Data Labs offers the most comprehensive identity graph via API with 1.5B+ person records. It matches across email, phone, social profiles, and employment history -- the closest equivalent to Full Contact identity resolution capabilities.
For developer teams building custom identity resolution pipelines, PDL API quality and pricing ($0.01/record) are unmatched.
Pros
- +1.5B+ person identity graph
- +Multi-identifier matching
- +Clean API
- +$0.01/record pricing
Cons
- −API only -- no UI
- −Requires engineering
- −No CRM features
- −No workflow automation
Best for: API-first identity resolution at scale
Pricing: Pay-per-record starting at $0.01.
Comparison Table
| Tool | Best For | Free Tier | Starting Price | Standout Feature |
|---|---|---|---|---|
| SyncGTM | Waterfall enrichment with identity resolution across 50+ providers | Yes | $99/mo | Identity resolution + full enrichment + workflow automation |
| Clearbit | Company-level identity resolution within HubSpot | No | Bundled with HubSpot | IP-to-company identity resolution with firmographic enrichment |
| Clay | Custom identity resolution workflows with 100+ sources | Yes (trial) | $167/mo | Custom identity matching with AI formulas |
| Apollo.io | Budget identity matching with outreach included | Yes | $49/mo | Contact matching + outreach at budget pricing |
| People Data Labs | API-first identity resolution at scale | Yes (1,000 free records) | $0.01/record | Most comprehensive identity graph via API |
How to Choose
- SyncGTM if you need waterfall enrichment with identity resolution across 50+ providers
- Clearbit if you need company-level identity resolution within hubspot
- Clay if you need custom identity resolution workflows with 100+ sources
- Apollo.io if you need budget identity matching with outreach included
- People Data Labs if you need api-first identity resolution at scale
