Runback vs. the field

The others observe. Runback re-executes and proves.

Runback re-runs a decision deterministically, seals a tamper-evident record, and gates the next change against policy. Where a competitor does ship gating or replay, the per-tool pages below say so.

a log · read onlyyou can read it
a runback record · executablediverges hereyou can run it again
12capabilities compared
8Runback capabilities, each verified in public CI
Capability
Runback
Observability toolsLangSmith · Langfuse · Helicone · Braintrust · Arize AI · Traceloop · Portkey
See what the agent did
Reproduce a real incident bit-for-bit
Continue a counterfactual past the first divergence
Bisect the model/prompt change that caused a regression
Simulate a policy against history, then enforce it live
Regression tests auto-mined from incidents
partial
Replay fidelity compounds with every captured run
Tamper-evident, signed system of record
Isolates concurrent agent calls (AsyncLocalStorage) — no cross-request context bleed
not assessed
Ignores volatile noise (timestamps, request IDs) so replay match doesn't false-positive
Hash tree resistant to substitution attacks, not just a flat hash chain (Merkle-rooted, domain-separated)
Runs in your perimeter · self-hostable
partial

Read-only observability is a crowded category. Every claim in Runback's own column runs green in public CI ↗.

Not the same category as real-time guardrail/trust-and-safety filters (prompt injection, jailbreak, PII exfiltration) — those inspect a single call in isolation and are worth running alongside Runback, not instead of it. Runback's gate gets its verdict from simulating your policy against your own decision history first, then enforcing it live, and every block is a signed entry in the same ledger as everything else — provable after the fact, not just filtered in the moment.

Head-to-head

Pick your incumbent.

Compiled from each vendor's public documentation — the date and source for every row are on that vendor's page. Products change; if a row is out of date or wrong, tell us at legal@runback.dev and we will correct it. All product names and trade marks are the property of their respective owners. Runback is not affiliated with, endorsed by, or sponsored by any of them.

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