By SyncGTM Team · March 11, 2026 · 8 min read
Best FullContact Alternatives for Identity Resolution in 2026
FullContact specializes in identity resolution, but alternatives deliver broader enrichment and better automation alongside identity matching. Here are the top options.
FullContact has long been the go-to for identity resolution -- matching emails, phones, and social profiles to unified person records. But in 2026, most B2B teams need more than identity matching; they need full data enrichment, workflow automation, and CRM integration.
We compared five FullContact alternatives that provide 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 identity matching across 50+ providers
- Clearbit (HubSpot) -- Best for company identity resolution within HubSpot
- Clay ($167/mo) -- Best for custom identity workflows with 100+ sources
- People Data Labs ($0.01/record) -- Best API-first identity graph at scale
- Apollo.io ($49/mo) -- Best budget alternative with contact matching and outreach
What We Evaluated
- Identity resolution -- multi-identifier matching, deduplication accuracy
- Enrichment depth -- data appended beyond identity matching
- API quality -- latency, documentation, reliability
- CRM integration -- native sync, deduplication triggers
- Pricing -- cost compared to FullContact
1. SyncGTM — Waterfall enrichment with identity resolution across 50+ providers
SyncGTM — Waterfall enrichment with identity resolution across 50+ providers
SyncGTM resolves identities as part of its waterfall enrichment process. By querying 50+ providers for each record, it cross-references data points to match and unify profiles -- delivering identity resolution alongside full enrichment.
The workflow builder adds automation that FullContact lacks -- scoring, routing, and CRM sync in multi-step pipelines. AI research agents gather additional identity signals from the open web.
Pros
- +Identity matching through 50+ provider waterfall
- +Full enrichment beyond identity resolution
- +Workflow automation
- +Native CRM integrations
- +Free tier
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 identity resolution within HubSpot
Clearbit — Company identity resolution within HubSpot
Clearbit (HubSpot Breeze Intelligence) excels at company-level identity resolution -- matching IP addresses, domains, and email patterns to company profiles. The Reveal feature identifies anonymous website visitors by company identity.
For company-level identity resolution within HubSpot, Clearbit is the strongest FullContact alternative.
Pros
- +IP-to-company identity
- +Real-time matching
- +Native HubSpot integration
- +Strong firmographic data
Cons
- −Requires HubSpot
- −Limited person-level identity
- −No phone data
- −HubSpot tier pricing
Best for: Company identity resolution within HubSpot
Pricing: Included with HubSpot Marketing Hub Professional+.
3. Clay — Custom identity resolution with 100+ sources
Clay — Custom identity resolution with 100+ sources
Clay handles identity resolution through 100+ enrichment integrations with AI formulas for custom matching logic. You can deduplicate, merge, and unify records based on multiple identifiers in a spreadsheet interface.
For teams needing custom identity matching workflows, Clay flexibility exceeds FullContact and SyncGTM.
Pros
- +100+ sources for matching
- +AI formulas for custom logic
- +Deduplication workflows
- +Flexible merging
Cons
- −$167/mo minimum
- −Credit-based
- −Learning curve
- −No CRM
Best for: Custom identity resolution with 100+ sources
Pricing: Free trial. Launch $167/mo. Growth $446/mo. Enterprise custom.
4. 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+ records. Multi-identifier matching across email, phone, social profiles, and employment history makes it the closest equivalent to FullContact core capabilities.
For developer teams building custom identity pipelines, PDL API and $0.01/record pricing are the best option.
Pros
- +1.5B+ identity graph
- +Multi-identifier matching
- +Clean API
- +$0.01/record
Cons
- −API only
- −Requires engineering
- −No CRM
- −No automation
Best for: API-first identity resolution at scale
Pricing: Pay-per-record starting at $0.01.
5. Apollo.io — Budget identity matching with outreach
Apollo.io — Budget identity matching with outreach
Apollo provides basic identity matching through its 275M+ database. Given an email or LinkedIn URL, it matches and enriches the full profile. Not a dedicated identity tool, but it covers basic matching plus outreach.
The free tier makes it the most accessible option for basic identity needs.
Pros
- +275M+ contacts for matching
- +Built-in outreach
- +Free tier
- +CRM sync
Cons
- −Basic identity only
- −Single source
- −No cross-device
- −Email accuracy issues
Best for: Budget identity matching with outreach
Pricing: Free (10k credits). Basic $49/mo. Professional $79/mo. Organization $119/mo.
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 identity resolution within HubSpot | No | Bundled with HubSpot | IP-to-company identity resolution with firmographics |
| Clay | Custom identity resolution with 100+ sources | Yes (trial) | $167/mo | Custom identity matching with AI formulas |
| People Data Labs | API-first identity resolution at scale | Yes (1,000 records) | $0.01/record | Most comprehensive identity graph via API |
| Apollo.io | Budget identity matching with outreach | Yes | $49/mo | Contact matching + outreach at budget pricing |
How to Choose
- SyncGTM if you need waterfall enrichment with identity resolution across 50+ providers
- Clearbit if you need company identity resolution within hubspot
- Clay if you need custom identity resolution with 100+ sources
- People Data Labs if you need api-first identity resolution at scale
- Apollo.io if you need budget identity matching with outreach
