Head to head
Explorium vs FullContact
As a data enrichment API, Explorium rates higher on the APIbenchmarks Index, 77.4 to 68.4, a 9-point gap. Here is how they compare on each criterion.
Criterion by criterion
| Criterion | Explorium | FullContact |
|---|---|---|
| Documentation & DX | ||
| Reliability | ||
| Ecosystem & SDKs | ||
| Accessibility | ||
| APIbenchmarks Index | 77.4 | 68.4 |
Specifications
| Explorium | FullContact | |
|---|---|---|
| Best for | Agent-driven company and prospect enrichment | Identity resolution / Identity Graph |
| Free tier | 100 free credits, valid 90 days (not recurring) | 100 API calls/mo (Developer plan) |
| Pricing | Prepaid credit packages | Per matched API call |
| Official SDKs | 7 languages | 7 languages |
Is Explorium better than FullContact?
On the APIbenchmarks Index, Explorium rates higher (77.4 vs 68.4). It leads on the four weighted criteria, but price is reported separately, so the best choice still depends on your budget.
Verdict in one line
Explorium leads by 9 points (77.4 vs 68.4) and wins 3 of 4 criteria.
Winner by criterion
| Criterion | Winner | ||
|---|---|---|---|
| Documentation & DX | 82 | 70 | |
| Reliability | 70 | 70 | Tie |
| Ecosystem & SDKs | 74 | 62 | |
| Accessibility | 84 | 72 |
Choose Explorium if… / choose FullContact if…
- →documentation & dx matters most to you (82 vs 70)
- →ecosystem & sdks matters most to you (74 vs 62)
- →accessibility matters most to you (84 vs 72)
- →your use case matches its focus: agent-driven company and prospect enrichment
- →your use case matches its focus: identity resolution / identity graph
Pricing side by side
- Model
- Prepaid credit packages
- Free tier
- 100 free credits, valid 90 days (not recurring)
- Free trial$0
- Lite$29.99
- Starter$149.99
- Growth$749.99
- Scale$7,499.99
- EnterpriseCustom
- Model
- Per matched API call
- Free tier
- 100 API calls/mo (Developer plan)
- Developer (Free)$0
- Growth$99/month
- Basic~$500/month
- Premium~$2,000/month
- Enterprise$10,000+/month (custom)
Vendor-published pricing, verified 2026-10-07 (Explorium) and 2026-06-27 (FullContact).
SDK and language coverage
Both · 0
None
Only Explorium · 7
REST API (HTTPS / JSON)OpenAPI specification (/openapi.json)AgentSource MCP server (remote, Bearer auth)explorium-mcp-server (Python, pip)Python MCP SDK, LangGraph and OpenAI implementation guidesllms.txt documentation indexNo first-party REST language SDKs
Only FullContact · 7
Go (official V3 client)Java 8 (official V3 client)Java 11+ (official V3 client)Python (official V3 client)Ruby (archived/legacy)PHP (archived/legacy)Postman collection
Strengths and weaknesses
- +Self-serve free account and public prepaid packages from $29.99, no sales call needed
- +OpenAPI spec and llms.txt published alongside the API reference
- +Documented rate limit (200 queries/min) with X-RateLimit-* headers and Retry-After
- –No public status page or independent uptime history found; 99.999% uptime is a vendor claim
- –No first-party REST language SDKs; Python path uses the generic MCP SDK
- –Free credits are a one-time 100-credit, 90-day grant
- +Multi-field enrichment: accepts many identifier types (email, phone, name+address, social URLs/usernames, MAIDs, plus Resolve PersonIDs) to lift match rates
- +Deep attribute coverage, 900+ appendable data attributes via Person Insights Bundles (demographics, household, employment history, affinities, shopping habits)
- +Tunable confidence: ML 'Belief Vector' lets callers set confidence thresholds per request to balance precision vs. match rate
- –Real-world match rates often far below the advertised 93%, reviewers report ~40-50%, especially outside the U.S.
- –Data-quality complaints of false positives in age, employment, and education fields, with no data-freshness timestamps on attributes
- –Rate limit (~600 queries/min) too low for large batch enrichment jobs
Explorium vs FullContact: questions
- Which has better documentation, Explorium or FullContact?
- Explorium scores higher on documentation and developer experience: 82 vs 70 out of 100.
- Which is more reliable, Explorium or FullContact?
- Explorium and FullContact score the same on reliability (70).
- Do Explorium and FullContact have a free tier?
- Explorium: yes (100 free credits, valid 90 days (not recurring)). FullContact: yes (100 API calls/mo (Developer plan)).
- How are Explorium and FullContact priced?
- Explorium: Prepaid credit packages. FullContact: Per matched API call.
- Which has more official SDKs?
- Both list 7 official SDKs.