| Customer-facing activity feed | Build the API + UI yourself | Not designed for it — data is aggregated for internal dashboards | No — logs are internal by design | Varies; often admin-only | Drop-in web component + feed API |
| Append-only audit semantics | Up to your discipline | No — events can be mutated/deleted by admins | Yes, within retention | Yes | Yes — no edit/delete path exists |
| Per-user scoped reads (safe in a browser) | Design + build it yourself | No — API keys read everything | No | Varies | Feed tokens: one actor, short-lived |
| Retention enforced automatically | Write and monitor the purge job | Plan-based, aggregate-oriented | Yes (priced per GB ingested) | Yes | Hourly, by plan (30/90/365 days) |
| CSV/JSON export for audits | Build it | Usually paid tier / API gymnastics | Yes | Yes | Every plan, filtered, one GET |
| Typical cost at seed stage | ~10 eng-weeks + maintenance | $0–$300/mo (but wrong tool) | $100s/mo at modest volume | $1k+/mo, annual contracts | $0–$99/mo |