Honest comparison
Decize vs Decision Log (decisionlog.ai)
Choose Decision Log if you need a strict system of record that AI agents and developer tools read and write through an API, CLI or MCP, with immutable decisions and explicit supersession. Choose Decize if your team decides in email and the gap is follow-through: owners, deadlines, outcomes and whether confident calls work out.
What Decision Log (decisionlog.ai) is
Decision Log describes itself as the durable system of record for decisions made by people and AI agents. Decisions are immutable; a change creates a new decision linked by supersession, with rationale, actor attribution and source provenance. It offers a web app plus GraphQL, REST, CLI and MCP access, and says it stays deliberately narrow.
Side by side
| Decize | Decision Log (decisionlog.ai) | |
|---|---|---|
| How decisions get captured | Decize: Forward or Cc an email to your workspace address, type it in plain language, or import a document. Decize drafts the fields; a person confirms. | Decision Log (decisionlog.ai): Web app, GraphQL or REST API, CLI and MCP. AI-extracted decisions arrive as candidates a person reviews before activation. |
| Built for | Decize: Teams whose decisions happen in email and conversation, including people who never open an account. | Decision Log (decisionlog.ai): People and AI agents. Its pages address organizations, product teams, developers and AI-agent operators. |
| Changing a decision | Decize: The record grows as the outcome and lesson are added. Owners and managers can delete a decision outright. | Decision Log (decisionlog.ai): Decisions are immutable. A change is a new decision with an explicit supersession link and an audit event. |
| Follows up on outcomes | Decize: Deadline reminders, then a one-tap outcome email to the owner about two weeks after the decision matures. No login needed. | Decision Log (decisionlog.ai): Not described on its homepage, pricing page or agent instructions. |
| Forecasts and calibration | Decize: Optional confidence and dated forecast on each decision. Calibration, including a Brier score, needs five resolved forecasts and starts on Business. | Decision Log (decisionlog.ai): Not described on its homepage, pricing page or agent instructions. |
| Pricing model | Decize: Per decision, never per seat: $0 for 10 a month, $99 for 50, $249 for 200. Unlimited people on every plan. | Decision Log (decisionlog.ai): Individual: free, one user, 10,000 agent operations a month. Team: $10 per user a month or $40 per user a year, plus metered operations. |
| Integrations | Decize: Its own web app plus your email. No Slack app yet. | Decision Log (decisionlog.ai): API, CLI, MCP, an SDK and an agent plugin. Its pages mention no Slack, email or meeting integration. |
| Access model | Decize: Every member reads the whole ledger; there are no private decisions. No per-person scores anywhere. | Decision Log (decisionlog.ai): Organization roles and permissions on Team, scoped and revocable machine credentials, and append-only audit events. |
Choose Decision Log (decisionlog.ai) if
- AI agents or internal tools need to look up the current decision before they act.
- You need immutable records with explicit supersession and a full audit trail.
- Your team is comfortable working through an API, a CLI or MCP clients.
- You want a free single-user plan for personal or developer use.
Choose Decize if
- Decisions happen in email and you want them captured by forwarding or Cc.
- You want owners reminded before deadlines and asked how each decision turned out.
- You want forecast calibration built up over time.
- You want unlimited people at a price set by decision volume, not seats.
Sources: Decision Log homepage · Decision Log pricing · Decision Log agent instructions (llms.txt) · Decision Log for teams