# EmailEngine vs Gmail API (slim)

> Gmail API scores 77.8 (BB) on agent readiness against EmailEngine's 71.4 (BB), and leads in 5 of 7 scored categories. EmailEngine leads on schema & documentation and payments & pricing. Both do mailbox read. Category scores, facts, verdicts and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/emailengine-vs-gmail-api.md (~2,050 tokens) · this version ~680 tokens · JSON https://www.anchorterminal.com/compare/emailengine-vs-gmail-api.json · canonical https://www.anchorterminal.com/compare/emailengine-vs-gmail-api
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-08

Gmail API scores 77.8 (BB) on agent readiness against EmailEngine's 71.4 (BB), and leads in 5 of 7 scored categories. EmailEngine leads on schema & documentation and payments & pricing. Both do mailbox read.

- EmailEngine: BB 71.4, rank #106 of 629 · https://www.anchorterminal.com/tools/emailengine.min.md
- Gmail API: BB 77.8, rank #17 of 629 · https://www.anchorterminal.com/tools/gmail-api.min.md
- EmailEngine, good for A team that must keep mailbox access on its own infrastructure, has many mailboxes across Gmail, Microsoft 365 and IMAP, and can run a server and Redis. Ahead on Schema & documentation, 91 against 82; Payments & pricing, 40 against 35.
- Gmail API, good for An agent working in a Gmail or Google Workspace user's own mailbox, with search, threads, drafts, labels and incremental sync at no per-account fee. Ahead on Reliability, 90 against 79; Security & auth, 81 against 71; Transparency & trust, 82 against 72. Also A hosted endpoint, with nothing to install; No incidents deducted, where EmailEngine loses 3 points for them.

| Category | EmailEngine | Gmail API |
| --- | --- | --- |
| Reliability (16%) | 79 | 90 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 91 | 82 |
| Agent ergonomics (13%) | 80 | 82 |
| Security & auth (14%) | 71 | 81 |
| Payments & pricing (10%) | 40 | 35 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 81 | 85 |
| Transparency & trust (7%) | 72 | 82 |

| Fact (where they differ) | EmailEngine | Gmail API |
| --- | --- | --- |
| Vendor | Postal Systems OÜ | Google |
| Hosted endpoint | no (local only) | `https://gmail.googleapis.com/gmail/v1` |
| Transports | HTTP | HTTP, Streamable HTTP |
| Auth | API key | OAuth |
| Pricing | Paid | Free |
| Licence | Source available under the EmailEngine licence agreement, version 2.1 of 17 October 2023. Not open source. The PHP SDK is MIT | Apache-2.0 (client libraries) |
| Tools exposed | none | 23 |
| llms.txt | yes | no |
| Last release | 2026-10-05 | 2026-09-23 |
| Terms last updated | no date given | 2021-11-09 |
| Privacy policy last updated | no date given | 2026-10-01 |
| Customer content may train models | not found in the text | yes |
| Terms or service can change without notice | yes | not found in the text |
| Popularity | 2.2k stars, 388 npm/wk | 12k stars, 1.1M npm/wk |