head to head · open source
harvey vs EspoCRM
harvey has 4,053 GitHub stars, 844 forks, 12 open issues and last shipped yesterday. EspoCRM has 3,541 stars, 1,017 forks, 69 open issues and last shipped yesterday. harvey leads on adoption by 14% (4,053 vs 3,541 stars). harvey is written in Python under MIT; EspoCRM is written in PHP under AGPL-3.0. harvey has attracted 21% as many forks as stars, EspoCRM 29%. EspoCRM was the more recently maintained of the two, and both are self-hostable with no licence fee.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| harvey | EspoCRM | |
|---|---|---|
| GitHub stars | ★ 4.1K | ★ 3.5K |
| License | MIT | AGPL-3.0 |
| Written in | Python | PHP |
| Last push | 2026-11-02 | 2026-11-02 |
| Forks | ⑂ 844 | ⑂ 1.0K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick harvey if
- You weight community size — 4.1K stars and counting
- You want the MIT license terms
- Your stack matches Python
- You value the larger contributor base for long-term maintenance
pick EspoCRM if
- You want the EspoCRM feature set and don't need the biggest community
- You prefer the AGPL-3.0 license terms
- Your stack matches PHP
- You evaluated both and EspoCRM fits your workflow better
About harvey
Harvey An autonomous sales agent that runs on your Claude Code or Codex subscription. Harvey finds businesses worth selling to, learns something specific about each one, writes cold email that references it, sends it, reads the replies, and works the conversation toward a meeting. It runs on your machine, in a loop, on its own. The unusual part: there is no model API bill. Harvey uses your Claude Pro or Max subscription through Claude Code, or your ChatGPT subscription through Codex. Model calls use the plan you already pay for, without an API key or per token API billing. Claude is the default; Codex is an opt…
read the full harvey overview →
About EspoCRM
EspoCRM EspoCRM is a free, open source CRM platform designed to help organizations build and maintain strong customer relationships. It provides a wide range of tools to store, organize, and manage leads, contacts, sales opportunities, marketing campaigns, support cases, and more – all business information in a simple and intuitive interface. Architecture EspoCRM is a web application with a frontend designed as a single page application and a REST API backend written in PHP. Demo You can try the CRM on an online demo. Requirements PHP 8.3 8.5; MySQL 8.0 (and later), or MariaDB 10.3 (and later); PostgreSQL 15…
read the full EspoCRM overview →
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Frequently asked questions
Is harvey or EspoCRM more popular?
harvey has 4,053 GitHub stars and EspoCRM has 3,541. harvey has the larger community by that measure.
Are harvey and EspoCRM free?
Both are open source. harvey is licensed under MIT and EspoCRM under AGPL-3.0. Neither carries a licence fee.
What is the difference between harvey and EspoCRM?
harvey is written in Python and EspoCRM in PHP. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, harvey or EspoCRM?
Choose harvey if you want the larger community (4,053 stars) or its MIT licence terms. Choose EspoCRM if its feature set, stack or AGPL-3.0 licence fits better. Both are self-hostable.