Relay vs Devin.
Devin collapses planning, coding, reviewing, and shipping into one autonomous workflow. Relay keeps those lanes separate and reviews every diff before it ships.
One general-purpose agent versus a coordinated fleet for specific SDLC tasks.
Positioning · 01
Fleet over singular genius.
Devin compresses planning, coding, reviewing, and shipping into a single autonomous workflow. Relay splits those steps into four narrowly-scoped lanes so each piece of work has a different owner and a different context window. The fleet handles the triage and ops relief across the whole SDLC — it is not headcount replacement, it is structured ownership end to end.
pillar · 01
No one lane owns planning, coding, reviewing, and shipping together. Four narrow specialists stay sharper than one general-purpose prompt with a fattened context window.
pillar · 02
Intake, staleness, security sweep, small-PR drafting, and review are five separate lanes — each one relieving the on-call queue instead of replacing it.
pillar · 03
The merge seat stays human. The fleet files PRs, runs the review, runs the security sweep, projects the FinOps card — and waits for a human to merge.
Feature-level breakdown · 02
The four-agent fleet behind every PR.
Each agent has its own tag, its own lane, and its own handoff pattern. Read the cards below for the canonical copy — the same shape the /product page and the /agents/[slug] detail pages render from.
Reads each diff against repo conventions and the team’s review history, flags regressions and missing tests, leaves scoped comments without taking the merge seat.
- Owns
- Every opened PR, end-to-end until a ship or close decision.
- Hands to
- Hands clean diffs or rejection notes to the fix shipper.
Runs SAST, dependency CVE scans, secret-leak checks, and policy probes on every change — including those the team hasn’t reviewed yet. Continuous coverage, not queue-bound.
- Owns
- Continuous coverage across all branches, not just review queue.
- Hands to
- Files CVE tickets with a remediation owner and a draft fix.
Routes new issues, deduplicates against history, asks for repro detail when needed, and escalates the long tail of stale tickets back to humans. Intake and staleness, nothing else.
- Owns
- The intake queue and the staleness report.
- Hands to
- Sends triaged, scoped work to the fix shipper or back to the team.
Produces small, scoped PRs from alerts or wrangler tickets — observability-to-fix pipelines put root-cause analysis on the chain end-to-end. FinOps check on every change.
- Owns
- One small PR per task, with FinOps checks on every change.
- Hands to
- Always returns the diff to the reviewer; never merges.
Five axes · 03
Where the lane split changes the answer.
Five rows pulled straight from the same fleet-vs-single-agent framing on /compare. Each row is one operational question — capability, scope, write behavior, target user, pricing — and a single sentence on each side.
| Capability | Devin | Relay fleet |
|---|---|---|
| Agents / capability | One general-purpose autonomous engineer — planning, coding, testing, and shipping all share a single identity and a single context window. | Four narrowly-scoped specialists: PR-01, SEC-02, ISS-03, and FX-04. Each has its own context budget and its own owner; nothing fuses into one mega-prompt. |
| Scope | A ticket travels from intake to merged PR end-to-end inside one workflow. Plan, code, review, and ship are all the same step. | Each assignment lands on a discrete SDLC lane — review (PR-01), security sweep (SEC-02), intake and staleness (ISS-03), and fix-shipper (FX-04). Every lane has its own agent. |
| MR / PR write behavior | Devin opens the PR and the same model is the one running the review step. The reviewer's seat sits inside the author's context, by construction. | FX-04 drafts small, scoped PRs. PR-01 reads the diff against conventions, regression risk, and test coverage and hands it back to the shipper or escalates to a human. SEC-02 covers every branch in parallel. The merge seat stays human even on a fully autonomous cycle. |
| Target user | Teams that want a black-box "engineer" handed a ticket and a merged PR — one identity whose every step is fused into a single workflow. | Enterprise platform teams that need an audit trail whose every step has a different owner, and a policy gate positioned upstream of every merge — not after the diff is already open. |
| Pricing model | Per-seat and per-task autonomous-engineer pricing — one bill covers one workflow. | Per-repo monthly (Starter / Team / Enterprise). Four lanes, four owners, one bill against the codebase — see /pricing for the full tier shape. |
Verdict · 04
Where the fleet beats the end-to-end engineer.
Devin collapses lanes into one workflow, so the same model both drafts and approves the PR. Relay keeps the lanes separate — reviewer never sits inside shipper context — and the merge seat never leaves a human, even when the autonomous cycle ships end-to-end. The result is an audit trail whose every step has a different owner.
Best fit
Devin fits a pilot where one workflow per ticket is the right curve. Once the queue grows, the bar for governance tightens, or the FinOps lead wants a projection on every PR — the fleet shape keeps paying off.
Pilot a fleet when end-to-end autonomy is the wrong curve.
Pilot starts as a shadow-run on a single repo: agents file PRs but never merge until your team signs off. Drop your email and we will scope the lane and bring the merge gate with us.
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See the fleet pricing