Head to head
Apollo.io vs Coresignal
As a ai candidate sourcing tools API, Apollo.io rates higher on the APIbenchmarks Index, 80.1 to 75.2, a 4.9-point gap. Here is how they compare on each criterion.
Criterion by criterion
| Criterion | Apollo.io | Coresignal |
|---|---|---|
| Documentation & DX | ||
| Reliability | ||
| Ecosystem & SDKs | ||
| Accessibility | ||
| APIbenchmarks Index | 80.1 | 75.2 |
Specifications
| Apollo.io | Coresignal | |
|---|---|---|
| Best for | Sales engagement plus enrichment | Raw professional and jobs data for engineering teams |
| Free tier | 10k credits/mo (verified corporate domain) or 100/mo | No |
| Pricing | Per credit (email 1, phone 8) | Monthly credit subscription (Collect + Search credits) |
| Official SDKs | 6 languages | 5 languages |
Is Apollo.io better than Coresignal?
On the APIbenchmarks Index, Apollo.io rates higher (80.1 vs 75.2). 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
Apollo.io leads by 4.9 points (80.1 vs 75.2) and wins 3 of 4 criteria.
Winner by criterion
| Criterion | Winner | ||
|---|---|---|---|
| Documentation & DX | 80 | 80 | Tie |
| Reliability | 84 | 78 | |
| Ecosystem & SDKs | 78 | 66 | |
| Accessibility | 78 | 76 |
Choose Apollo.io if… / choose Coresignal if…
- →reliability matters most to you (84 vs 78)
- →ecosystem & sdks matters most to you (78 vs 66)
- →accessibility matters most to you (78 vs 76)
- →you want a free tier to start (10k credits/mo (verified corporate domain) or 100/mo)
- →you need broad SDK coverage (6 official SDKs vs 5)
- →your use case matches its focus: sales engagement plus enrichment
- →your use case matches its focus: raw professional and jobs data for engineering teams
Pricing side by side
- Model
- Per credit (email 1, phone 8)
- Free tier
- 10k credits/mo (verified corporate domain) or 100/mo
- Free$0
- Basic$49/user/mo (annual)
- Professional$79/user/mo (annual)
- Organization$119/user/mo (annual)
- Overage credits$0.20 / credit
- Model
- Monthly credit subscription (Collect + Search credits)
- Free tier
- No
- Free trial$0
- Mini$49/mo
- Starter$199/mo
- Pro$499/mo
- Growth to Elite$1,000 to $5,000/mo
- DatasetsFrom $1,000+
Vendor-published pricing, verified 2026-06-27 (Apollo.io) and 2026-10-07 (Coresignal).
SDK and language coverage
Both · 1
REST API (HTTPS / JSON)
Only Apollo.io · 5
OpenAPI / Swagger specificationApollo MCP serverApollo CLIllms.txt index for AI agentsCommunity-built clients (e.g. Ruby gem EnaiaInc/apollo_io), no official first-party language SDKs
Only Coresignal · 4
Coresignal MCP server (Node.js via mcp-remote)API playgrounds (web)llms.txt / llms-full.txt documentation exportsNo official language SDKs found
Strengths and weaknesses
- +Large database (275M+ contacts, 73M+ companies) with strong US coverage (~80–88% match accuracy)
- +Aggressive pricing that undercuts ZoomInfo/Lusha-class incumbents for comparable breadth
- +Bulk enrichment endpoints (up to 10 people or companies per call) reduce call volume
- –Data accuracy drops sharply outside the US (~60–73% in EU/APAC/LATAM); stale titles common
- –Phone numbers cost 8 credits each yet user-reported direct-dial accuracy is only ~50–70%
- –Credits expire every billing cycle with no rollover and no refund on unused balance
- +Transparent self-serve credit plans from $49/month, no sales call to start
- +Quickstart, API playgrounds, rate-limit reference and llms.txt/llms-full.txt exports in the docs
- +Official MCP server for Claude, Cursor and other MCP clients
- –No official language SDKs, OpenAPI spec page or Postman collection found in the docs index
- –Free access is a 7-day trial only, not a recurring free tier
- –Company data refreshes roughly monthly per third-party reviews; no direct-dial phone numbers
Apollo.io vs Coresignal: questions
- Which has better documentation, Apollo.io or Coresignal?
- Apollo.io and Coresignal score the same on documentation and developer experience (80).
- Which is more reliable, Apollo.io or Coresignal?
- Apollo.io scores higher on reliability: 84 vs 78 out of 100.
- Do Apollo.io and Coresignal have a free tier?
- Apollo.io: yes (10k credits/mo (verified corporate domain) or 100/mo). Coresignal: no free tier.
- How are Apollo.io and Coresignal priced?
- Apollo.io: Per credit (email 1, phone 8). Coresignal: Monthly credit subscription (Collect + Search credits).
- Which has more official SDKs?
- Apollo.io lists 6 official SDKs, Coresignal lists 5.