Clara vs Holt
Clara
claralabs.comHolt
github.comSide by side
| Figure | Clara | Holt |
|---|---|---|
| Price from | $80/mo | Free |
| Free plan | Yes | Yes |
| Free trial | Yes | — |
| Open source | — | — |
| Web | Yes | — |
| Windows | — | Yes |
| macOS | — | Yes |
| Linux | — | Yes |
| Self-hosted | — | Yes |
| Plans published | 3 | 1 |
| Spec score · AI Personal Assistants | 8.9 (#8) | 8.0 (#25) |
| Integrations | Clara works natively with Google Workspace and Microsoft Outlook and Exchange. | Holt provides an MCP server for Claude Code, Cursor, and Codex, plus ambient memory hooks for Claude Code. |
| Privacy | The FAQ says no human reads scheduling emails and Clara does not train its models on customer data. | The maker says memory is local and per-folder by default, and that local-model recall works offline so data stays on the machine unless the user sends it elsewhere. |
| What it does | Clara is an AI scheduling assistant that works through email, reading threads, proposing times, following up and sending calendar invitations. | Holt is an open-source personal agent OS that runs on your machine and keeps readable, editable memory of your work. |
Plans
In their own words
Clara
Clara is a web-based AI scheduling assistant that manages meeting arrangements through email. It reads email threads, proposes times, handles replies, and confirms meetings; if invitees do not respond, it follows up in the thread. For rescheduling, it finds another time, cancels the original invite, and sends an updated one. It also coordinates group meetings, tracks participant responses, and supports calls across time zones. Users can set scheduling windows, buffer times, meeting types, priority contacts, and communication preferences. Clara works natively with Google Workspace and Microsoft Outlook and Exchange; its homepage also displays Zoom and Teams among associated tools. The maker says no human reads scheduling emails and that customer data is not used to train its models. Its privacy policy names OpenAI, Anthropic, and Google as AI providers that may receive email and calendar content to generate responses. The Free plan is free for 14 days and five meetings. Standard is $80 a month for 30 meetings; the free-plan limit stops further scheduling until upgrade.