Head to head
FullContact vs Prospeo
As a data enrichment API, Prospeo rates higher on the APIbenchmarks Index, 71.8 to 68.4, a 3.4-point gap. Here is how they compare on each criterion.
Criterion by criterion
| Criterion | FullContact | Prospeo |
|---|---|---|
| Documentation & DX | ||
| Reliability | ||
| Ecosystem & SDKs | ||
| Accessibility | ||
| APIbenchmarks Index | 68.4 | 71.8 |
Specifications
| FullContact | Prospeo | |
|---|---|---|
| Best for | Identity resolution / Identity Graph | Verified email and mobile finding for outbound |
| Free tier | 100 API calls/mo (Developer plan) | 100 credits/mo, API access included |
| Pricing | Per matched API call | Per credit (email 0.5-1, mobile 10) |
| Official SDKs | 7 languages | 4 languages |
Is FullContact better than Prospeo?
On the APIbenchmarks Index, Prospeo rates higher (71.8 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
Prospeo leads by 3.4 points (71.8 vs 68.4) and wins 2 of 4 criteria; FullContact wins 1.
Winner by criterion
| Criterion | Winner | ||
|---|---|---|---|
| Documentation & DX | 70 | 78 | |
| Reliability | 70 | 66 | |
| Ecosystem & SDKs | 62 | 62 | Tie |
| Accessibility | 72 | 82 |
Choose FullContact if… / choose Prospeo if…
- →reliability matters most to you (70 vs 66)
- →you need broad SDK coverage (7 official SDKs vs 4)
- →your use case matches its focus: identity resolution / identity graph
- →documentation & dx matters most to you (78 vs 70)
- →accessibility matters most to you (82 vs 72)
- →your use case matches its focus: verified email and mobile finding for outbound
Pricing side by side
- 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)
- Model
- Per credit (email 0.5-1, mobile 10)
- Free tier
- 100 credits/mo, API access included
- Free$0
- StarterAbout $49/mo ($37/mo annual)
- GrowthAbout $99/mo ($74/mo annual)
- ProAbout $249/mo ($187/mo annual)
Vendor-published pricing, verified 2026-06-27 (FullContact) and 2026-10-07 (Prospeo).
SDK and language coverage
Both · 0
None
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
Only Prospeo · 4
REST APIMCP server (mcp.prospeo.io)Composio and workflow-tool integrationsNo official SDKs found
Strengths and weaknesses
- +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
- +Free API access stated in the docs
- +Plan-tiered published rate limits and per-endpoint credit costs
- +Search over 200M+ contacts and 30M+ companies with 30+ filters
- –Unused credits expire every billing cycle
- –Per-user pricing multiplies for teams
- –Mobile reveals cost 10 credits
FullContact vs Prospeo: questions
- Which has better documentation, FullContact or Prospeo?
- Prospeo scores higher on documentation and developer experience: 78 vs 70 out of 100.
- Which is more reliable, FullContact or Prospeo?
- FullContact scores higher on reliability: 70 vs 66 out of 100.
- Do FullContact and Prospeo have a free tier?
- FullContact: yes (100 API calls/mo (Developer plan)). Prospeo: yes (100 credits/mo, API access included).
- How are FullContact and Prospeo priced?
- FullContact: Per matched API call. Prospeo: Per credit (email 0.5-1, mobile 10).
- Which has more official SDKs?
- FullContact lists 7 official SDKs, Prospeo lists 4.