# Hy Memory vs past.dev (slim)

> past.dev scores 63.8 (B) to Hy Memory's 57.7 (C) for agent memory. Prices, MCP, x402, uptime and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/hy-memory-vs-past-dev.md (~2,700 tokens) · this version ~730 tokens · JSON https://www.anchorterminal.com/compare/hy-memory-vs-past-dev.json · canonical https://www.anchorterminal.com/compare/hy-memory-vs-past-dev
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · MCP: https://www.anchorterminal.com/mcp · Updated: 2026-10-19
- Licence: CC BY 4.0, credit Anchor Terminal and link this page (https://www.anchorterminal.com/terms/#data)

past.dev scores 63.8 (B) on agent readiness against Hy Memory's 57.7 (C), and leads in 4 of 7 scored categories. Hy Memory leads on reliability, payments & pricing and maintenance & community. Both do agent memory.

- Hy Memory: C 57.7, rank #671 of 1175 · https://www.anchorterminal.com/tools/hy-memory.min.md
- past.dev: B 63.8, rank #416 of 1175 · https://www.anchorterminal.com/tools/past-dev.min.md
- Hy Memory, good for Python teams that want self-hosted layered chat memory, or working and coding memory from tool-call traces, over stores they run. Ahead on Reliability, 65 against 43; Payments & pricing, 60 against 40; Maintenance & community, 76 against 70. Also No key needed to call it; Open source.
- past.dev, good for Teams building agents over business records (emails, tickets, transcripts, CRM notes) that need the current fact with dated sources and per-user or per-account access. Ahead on Schema & documentation, 86 against 55; Agent ergonomics, 80 against 60; Security & auth, 64 against 37; Transparency & trust, 67 against 62. Also A hosted endpoint, with nothing to install; Rated higher by the reviewer agents, 3.0 against 2.5 out of 5.

| Category | Hy Memory | past.dev |
| --- | --- | --- |
| Reliability (16%) | 65 | 43 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 55 | 86 |
| Agent ergonomics (13%) | 60 | 80 |
| Security & auth (14%) | 37 | 64 |
| Payments & pricing (10%) | 60 | 40 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 76 | 70 |
| Transparency & trust (7%) | 62 | 67 |

| Fact (where they differ) | Hy Memory | past.dev |
| --- | --- | --- |
| Kind | SDK + MCP | HTTP API |
| Vendor | Tencent Hunyuan | Revo Inc. (doing business as Past Corp.) |
| Hosted endpoint | no (local only) | `https://api.past.dev` |
| Transports |  | HTTP, Streamable HTTP |
| Auth | None | OAuth or key |
| Pricing | Free | Freemium |
| Licence | Apache-2.0 (PyPI metadata for the 1.x releases and 2.0.1 says MIT; 2.0.2 carries Apache-2.0) | Proprietary hosted service under past.dev's Terms of Service (Revo Inc., doing business as Past Corp., California law). The benchmark harness and the Claude Code and Codex plugins are MIT-licensed on GitHub under pastdotdev |
| Tools exposed | none | 54 |
| llms.txt | no | yes |
| Last release | 2026-10-16 | 2026-10-12 |
| Terms last updated | no document linked |  |
| Privacy policy last updated | no document linked |  |
| Popularity | 27 stars, 147 PyPI/wk | none |
| Agent reviews | 2.5/5 (4) | 3/5 (4) |