Head to head · Agent harnesses · October 2026 research run

Devin vs Paseo

Paseo scores 62.1 (B) on agent readiness against Devin's 57.3 (C), and leads in 4 of 7 scored categories. Devin leads on schema & documentation, security & auth and transparency & trust. Both do agent harnesses.

Best agent harnesses and coding agents · All 1500 harnesses comparisons

Which one, for what

Devin C

Best for A team that wants to hand whole tasks to a cloud agent and collect pull requests, driven from a pipeline or another agent.

Ahead on

  • Schema & documentation, 80 against 65
  • Security & auth, 72 against 58
  • Transparency & trust, 75 against 68

Also in its favour

  • A hosted endpoint, with nothing to install

Watch for

www.devinstatus.com lists two outages on 13 August and the web app down for about two hours on 24 September 2026

Paseo B

Best for Developers who want parallel coding agents on their own machines with no telemetry, reachable from anywhere.

Ahead on

  • Reliability, 50 against 35
  • Agent ergonomics, 70 against 62
  • Payments & pricing, 60 against 20
  • Maintenance & community, 75 against 63

Also in its favour

  • No key needed to call it
  • Open source

Watch for

Pre-1.0, at 0.15.3

Why the edge

Each category where one leads by five points or more, with the reason behind each side's score from its assessment. The numbers are in the table below; this is what they stand for.

Payments & pricing Paseo +40

Devin 20

Published rubric. No payment protocol (0). Plan prices are public, $20, $200 and $40 a seat with an $80 team minimum, but usage past the quota is billed at an unpublished rate (10). A Free plan exists. The pricing page lists cloud agents from Pro upward, and we couldn't confirm API use on Free or whether a card is needed (10). A person signs up in a browser and provisions the service user in settings (0).

Paseo 60

Free self-hosted software with nothing to buy, so 0 for a protocol and 20 each for public pricing, a free tier and onboarding with no sign-up, 60.

Reliability Paseo +15

Devin 35

Hosted reading. Status page at www.devinstatus.com (Atlassian Statuspage) with 14 components, among them Cloud Agent and Cloud Web Client, read from the page itself on 4 November 2026 (20). Its history feed for the 90 days from 6 August 2026 lists Devin unavailable on 13 August (20 minutes), Devin Cloud unavailable on 13 August (2 hours 40 minutes) and the web app down on 24 September (about 2 hours), with minor session and Ask Devin incidents on 10 and 11 August, 3 and 17 September and 26 October. Both 13 August entries report the service unavailable. The 24 September entry names only the web app, not the API or the MCP server, so it is read as partial, as dashboard outages are on other listings. Two majors (5). Two scheduled maintenance entries (7 and 17 August) are read as maintenance. 429 is a documented response, but no rate limit figures were found (0). No Retry-After or backoff guidance found, and v3 session creation has no idempotency key (0). The platform terms give no guarantee of availability, and enterprise terms weren't read (0). The v3 API is the current, recommended surface, with 27 of 274 operations under /v3beta1 (10).

Paseo 50

Local software. Desktop builds, an Android APK, a Docker image and a Nix package (20). ci.yml on the repository; pass state not read (15). GitHub issues and pull requests weren't read (GitHub's pages refuse these sessions), so that line is scored absent (0). CHANGELOG.md (15). Version 0.15.3 (0). 20 + 15 + 0 + 15 + 0 = 50.

Schema & documentation Devin +15

Devin 80

API reading. Public OpenAPI 3.1 spec for v3 with 182 paths and 274 operations on 4 November 2026, and separate v1 and v2 specs (25). llms.txt with 393 lines and a Markdown twin of every page (10). Each endpoint page names its required permission, but 63 of 274 operations have no description and the MCP tool descriptions are one line each (10). Enums on fields such as devin_mode, origin and category, with most strings unconstrained and nullable (9). curl examples in the quick starts, and 401, 403, 404, 409, 422 and 429 declared on all 274 operations, without a catalogue of error_code values (11). Versioned paths (v1, v2, v3, v3beta1) and an API release notes page dated by month, newest November 2026 (15).

Paseo 65

Harness reading. Public docs, a CLI and plugin examples in the repository (65).

Security & auth Devin +14

Devin 72

Hosted reading. Service-user keys with roles and named permissions per endpoint, revocable, with rotation endpoints in beta for Enterprise and expiring personal tokens. Custom roles are an Enterprise option, and Teams has Admin and Member only (25). Security profiles restrict network, MCP servers, git and the Devin MCP to read-only, and read-only API permissions exist. They are opt-in, and session creation accepts bypass_approval (16). AI Guardrails screen user messages and pull request comments for prompt injection, on Enterprise only, and they don't cover web pages or repository content Devin reads (8). Audit logs through the API need an enterprise-level permission. Session events and insights are available on all plans (10). SOC 2 Type II and ISO/IEC 27001:2022, a disclosure address at security@cognition.ai, no security.txt, and the trust centre answers No to having a bug bounty (13).

Paseo 58

Harness reading. The README says no telemetry, tracking or forced log-ins (30 of 30). Worktree per agent, on your own machine (10 of 20). No prompt-injection guidance (5). No audit log (5). SECURITY.md (8). 30 + 10 + 5 + 5 + 8 = 58.

Maintenance & community Paseo +12

Devin 63

Closed service. Newest release note dated 2 November 2026 (30). Thirty dated release notes between 7 August and 2 November 2026, and API notes for August, September, October and November (20). Public release notes and a support address, with no public tracker or forum found (10). No official SDK for the Devin API found (a Python SDK in the federal docs covers analytics and ACU limits for air-gapped Desktop), and the Devin MCP server didn't appear in the official MCP registry per the 8 October check (0). No public CI or packages to assess, with the docs and three OpenAPI specs kept current (3).

Paseo 75

v0.15.3 and commits on 7 November 2026 (30). More than three releases in 90 days (20). GitHub issues and pull requests weren't read (GitHub's pages refuse these sessions), so that line is scored absent (0). Current builds (15). CI on push (10). 30 + 20 + 0 + 15 + 10 = 75.

Agent ergonomics Paseo +8

Devin 62

API and MCP reading. The MCP server documents 13 tools, several of them consolidated manage tools, and list endpoints take first to size a page (17). Cursor pagination on every v3 list endpoint and filters on session search by tag, playbook, origin, user and time (18). problem+json with error_code, field-level errors on 422 and a 400 that lists valid platform names, but no published code list (15). No idempotency key on v3 session creation. max_acu_limit caps what a session can spend, and the MCP tool annotations couldn't be read without a key (4). Only prompt is required to start a session. No official SDK found, only a Terraform provider (8).

Paseo 70

Harness reading. A self-hosted daemon that agents can use to create worktrees, launch other agents and talk to them, scriptable from the CLI (70).

Score by category

CategoryWeight this runDevinPaseoEdge
Reliability16%203550Paseo +15
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.28065Devin +15
Agent ergonomics13%16.26270Paseo +8
Security & auth14%17.57258Devin +14
Payments & pricing10%12.52060Paseo +40
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.86375Paseo +12
Transparency & trust7%8.87568Devin +7
Negative events≤1500
TotalC 57.3/100B 62.1/100

Facts side by side

FactDevinPaseo
KindAgent harnessAgent harness
VendorCognition AI, Inc.Mohamed Boudra
Hosted endpointhttps://mcp.devin.ai/mcpno (local only)
TransportsHTTP
AuthAPI keyNone
PricingFreemiumFree
x402nono
LicenceProprietary service under Cognition's Platform Terms of ServiceApache-2.0
Tools exposed13none
Read-only variant documentedyesno
llms.txtyesno
Last release2026-11-022026-11-07
Terms last updated2026-06-30no document linked
Privacy policy last updated2026-03-09no document linked
Customer content may train modelsyes, with an opt-outnot read yet
Terms restrict automated accessnot found in the textnot read yet
Terms restrict benchmarkingyesnot read yet
Terms or service can change without noticenot found in the textnot read yet
Arbitration or class-action waiveryesnot read yet

How the scores have moved

Verdicts

Devin

The v3 API is well specified, with a public OpenAPI 3.1 file covering 274 operations, problem+json errors, cursor pagination and service-user keys tied to roles. The status page records two outages on 13 August and a two-hour web app outage on 24 September 2026, and no rate limit figures or retry guidance were found in the reviewed documentation.

Paseo

A self-hosted, open-source workspace for running many coding agents on your own machines, scriptable from the CLI and reachable from phone, web or desktop, with no telemetry or forced log-in. It's pre-1.0 and run largely by one maintainer.

Before you call either

Devin

  1. Use a cog_ service-user key with the Member role. Legacy apk_ keys fail against v3 and the MCP server with 401 or 403
  2. Set max_acu_limit on every session you create. Usage is metered by the work done and has no published unit rate
  3. Session creation is not idempotent in v3. After a timeout, list sessions by tag before creating again
  4. Enterprise keys and personal access tokens must send X-Org-Id to the MCP server. Organisation-scoped keys resolve it automatically
  5. Create scheduled work as an automation. POST to the schedules endpoint returns 403 for migrated organisations since 24 September 2026

Paseo

  1. Run the daemon on the machine that has your tools and credentials, and connect from the clients
  2. Script runs from the CLI for repeatable agent jobs

Questions

Which is better for AI agents, Devin or Paseo?

Paseo scores 62.1 (B) on agent readiness against Devin's 57.3 (C), and leads in 4 of 7 scored categories. Devin leads on schema & documentation, security & auth and transparency & trust.

Are Devin and Paseo open source?

No open-source release is listed for Devin. Paseo is open source (Apache-2.0).

Other comparisons with Devin or Paseo

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