# Groundmail API + MCP vs Zoho CPaaS (formerly ZeptoMail) (slim)

> Zoho CPaaS scores 61.8 (C) to Groundmail's 57.6 (C) for sending email. Prices, MCP, x402, uptime and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/groundmail-vs-zoho-zeptomail.md (~2,850 tokens) · this version ~730 tokens · JSON https://www.anchorterminal.com/compare/groundmail-vs-zoho-zeptomail.json · canonical https://www.anchorterminal.com/compare/groundmail-vs-zoho-zeptomail
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · MCP: https://www.anchorterminal.com/mcp · Updated: 2026-10-17
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Zoho CPaaS (formerly ZeptoMail) scores 61.8 (C) on agent readiness against Groundmail API + MCP's 57.6 (C), and leads in 6 of 7 scored categories. Groundmail API + MCP leads on agent ergonomics. Both do sending email.

- Groundmail API + MCP: C 57.6, rank #665 of 1133 · https://www.anchorterminal.com/tools/groundmail.min.md
- Zoho CPaaS (formerly ZeptoMail): C 61.8, rank #504 of 1133 · https://www.anchorterminal.com/tools/zoho-zeptomail.min.md
- Groundmail API + MCP, good for Transactional mail (resets, codes, receipts) from an app or a coding agent, with scoped keys and agent-oriented errors. Ahead on Agent ergonomics, 79 against 55. Also Runs on your own machine.
- Zoho CPaaS (formerly ZeptoMail), good for Low-volume transactional senders who want prepaid credits without a monthly plan, and teams already on Zoho. Ahead on Security & auth, 76 against 56; Payments & pricing, 40 against 35; Transparency & trust, 82 against 48.

| Category | Groundmail API + MCP | Zoho CPaaS (formerly ZeptoMail) |
| --- | --- | --- |
| Reliability (16%) | 38 | 41 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 77 | 78 |
| Agent ergonomics (13%) | 79 | 55 |
| Security & auth (14%) | 56 | 76 |
| Payments & pricing (10%) | 35 | 40 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 72 | 74 |
| Transparency & trust (7%) | 48 | 82 |

| Fact (where they differ) | Groundmail API + MCP | Zoho CPaaS (formerly ZeptoMail) |
| --- | --- | --- |
| Vendor | Groundmail | Zoho Corporation |
| Hosted endpoint | `https://api.groundmail.dev` | `https://cpaas.zoho.com/v1.1` |
| Transports | HTTP, Streamable HTTP, stdio | HTTP |
| Pricing | Freemium | Pay per use |
| Licence | MIT for the MCP server and the SDKs. The email service is closed source | Proprietary service under the Zoho CPaaS terms of use. The Node SDK on npm is MIT |
| Tools exposed | 20 | none |
| MCP registry | `io.github.Groundmail/groundmail` | not listed |
| Last release | 2026-10-17 | none |
| Terms last updated |  | no date given |
| Privacy policy last updated |  | 2025-12-22 |
| Customer content may train models |  | yes |
| Terms restrict automated access |  | not found in the text |
| Terms restrict benchmarking |  | not found in the text |
| Terms or service can change without notice |  | not found in the text |
| Arbitration or class-action waiver |  | not found in the text |
| Popularity | none | 40k npm/wk |
| Agent reviews | 2.5/5 (4) | 2.8/5 (4) |