Dev
Free
Recurring25,000 spans/month; scope unconfirmed
- Included scope
- Agent instrumentation and evaluation advertised
Prefactor
● Identity checkedRuntime agent evaluations and enforcement · Official-source review 2026-10-09
Prefactor records agent spans and evaluates technical quality, model-judge scores and data risk. Instrumented applications can hold, approve, block or throttle operations using SDK/API controls and configured review policies.
- Category
- Runtime agent evaluations and enforcement
- Free access
- Dev tier advertises25,000 spans/month with no card. Paid prices, retention and free-tier enforcement scope require confirmation.
- API access
- TypeScript/Python SDKs and runtime API; native integration advertised for LangChain, Claude, Vercel AI, OpenClaw and LiveKit, with OpenTelemetry connectivity.
Is Prefactor right for you?
A good fit for
Relevant to developers connecting observable runs to policy checks and human review gates.
Before you choose
Version/schema management and dev/staging/prod promotion are advertised. Custom spans can attach external data, but any-datasource examples require actual configured fetches, not universally native integrations. SOC2TypeII in progress; RBAC roadmap, enterprise SSO advertised. Displayed latency/scores/held actions and installation time are demonstrations, not measurements here. Eval scores cannot prove correct or safe outcomes; enforcement only covers instrumented paths. Exact sampling, data retention and permissions need checks. No SDK install, agent trace, approval gate or external data connection performed.
Workflow and handoff
Instrument a synthetic agent, deliberately trigger a harmless policy violation and verify the operation remains blocked before using enforcement on real actions.
Pricing and practical limits
Version/schema management and dev/staging/prod promotion are advertised. Custom spans can attach external data, but any-datasource examples require actual configured fetches, not universally native integrations. SOC2TypeII in progress; RBAC roadmap, enterprise SSO advertised. Displayed latency/scores/held actions and installation time are demonstrations, not measurements here. Eval scores cannot prove correct or safe outcomes; enforcement only covers instrumented paths. Exact sampling, data retention and permissions need checks. No SDK install, agent trace, approval gate or external data connection performed.
Review method
Official product evidence reviewed on 2026-10-09; product artwork inspected visually. No hands-on vendor application test was performed. Application performance, security claims and plan enforcement were not independently tested.
What it can do
Features & capabilities
Unknown is different from unavailable. Each fact carries its own evidence.
| Capability | Value | Evidence | Checked |
|---|---|---|---|
| Product workflow | Prefactor records agent spans and evaluates technical quality, model-judge scores and data risk. Instrumented applications can hold, approve, block or throttle operations using SDK/API controls and configured review policies. | Facts sourced | 2026-10-09 |
| Pricing and restrictions | Version/schema management and dev/staging/prod promotion are advertised. Custom spans can attach external data, but any-datasource examples require actual configured fetches, not universally native integrations. SOC2TypeII in progress; RBAC roadmap, enterprise SSO advertised. Displayed latency/scores/held actions and installation time are demonstrations, not measurements here. Eval scores cannot prove correct or safe outcomes; enforcement only covers instrumented paths. Exact sampling, data retention and permissions need checks. No SDK install, agent trace, approval gate or external data connection performed. | Facts sourced | 2026-10-09 |
Understand the total cost
Prefactor pricing & plans
Paid / enterprise
Not listed
Rates and scope require confirmation
- Included scope
- Higher-scale runtime/lifecycle/security capabilities
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Frequently asked questions
Was the application hands-on tested?
No. This listing is based on dated official-source evidence and a visual artwork check. Unconfirmed costs and restrictions are identified explicitly.
What is Prefactor used for?
Prefactor records agent spans and evaluates technical quality, model-judge scores and data risk. Instrumented applications can hold, approve, block or throttle operations using SDK/API controls and configured review policies.
Does Prefactor have a free plan?
Dev tier advertises25,000 spans/month with no card. Paid prices, retention and free-tier enforcement scope require confirmation.. This record lists ongoing free access; check the plan limits before starting.
How much does Prefactor cost?
No paid monthly price is listed; this record treats the product as free to start. See the plan cards for entitlements, billing commitments and seat minimums.
Can I use Prefactor through an API?
TypeScript/Python SDKs and runtime API; native integration advertised for LangChain, Claude, Vercel AI, OpenClaw and LiveKit, with OpenTelemetry connectivity.. API access and subscription access may have different terms; consult the linked sources.
What should I check before choosing it?
Version/schema management and dev/staging/prod promotion are advertised. Custom spans can attach external data, but any-datasource examples require actual configured fetches, not universally native integrations. SOC2TypeII in progress; RBAC roadmap, enterprise SSO advertised. Displayed latency/scores/held actions and installation time are demonstrations, not measurements here. Eval scores cannot prove correct or safe outcomes; enforcement only covers instrumented paths. Exact sampling, data retention and permissions need checks. No SDK install, agent trace, approval gate or external data connection performed.
Price history
No retained pricing changes yet. A current price alone does not establish a historical trend.
How this profile is supported
Official product information
Current official product source read individually; product artwork inspected visually.
Read original source ↗Pricing review
Official product page reviewed for disclosed costs; unverified prices and allowances are identified in the listing.
Read original source ↗Facts apply to the named version and check date. Send a sourced correction if something changed.