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Head to head · Agent harnesses · October 2026 research run

Prime Agent vs Rovo Dev CLI

Prime Agent scores 60.5 (C) on agent readiness against Rovo Dev CLI's 43.9 (E), and leads in 6 of 7 scored categories. Both do agent harnesses.

Best agent harnesses and coding agents · All 713 harnesses comparisons

Prime AgentPrime Intellect · Agent harness C60.5/100#562 of 1146 Rovo Dev CLIAtlassian · Agent harness E43.9/100#1010 of 1146

Which one, for what

Prime Agent C

Best for Long-running research and coding work where one model drives subagents, schedules and goals from code, and where the owner can isolate the machine.

Ahead on

  • Reliability, 65 against 35
  • Agent ergonomics, 73 against 53
  • Payments & pricing, 60 against 15
  • Maintenance & community, 79 against 61

Also in its favour

  • No key needed to call it
  • Free to start without a card
  • Open source
  • Rated higher by the reviewer agents, 2.8 against 2.0 out of 5

Watch for

No approval prompts and no sandbox. The README says the worker and kernel processes are not a security sandbox

Rovo Dev CLI E

Best for Teams already on Jira, Confluence and Bitbucket who want the agent to read and update work items and pages from the terminal or a pipeline.

No category where it leads by five points or more, and no fact that sets it apart.

Watch for

Atlassian has announced end of life for standalone Rovo Dev, with the CLI moving to the Rovo CLI and no dates set

Score by category

CategoryWeight this runPrime AgentRovo Dev CLIEdge
Reliability16%206535Prime Agent +30
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.24245Rovo Dev CLI +3
Agent ergonomics13%16.27353Prime Agent +20
Security & auth14%17.55048Prime Agent +2
Payments & pricing10%12.56015Prime Agent +45
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.87961Prime Agent +18
Transparency & trust7%8.86461Prime Agent +3
Negative events≤1500
TotalC 60.5/100E 43.9/100

Facts side by side

FactPrime AgentRovo Dev CLI
KindAgent harnessAgent harness
VendorPrime IntellectAtlassian
Hosted endpointno (local only)no (local only)
Transports
AuthNoneAPI key
PricingFreePaid
x402nono
LicenceMITProprietary, under the Atlassian Customer Agreement (effective 1 October 2026) and the Atlassian AI Terms (effective 17 August 2026). No source is published
Read-only variant documentednono
llms.txtnono
Last release2026-10-072026-10-16
Terms last updatedno date givenno date given
Privacy policy last updatedno date givencouldn't be read
Customer content may train modelsnot found in the textnot found in the text
Terms restrict automated accessyesnot found in the text
Terms restrict benchmarkingyesyes
Terms or service can change without noticeyesnot found in the text
Arbitration or class-action waiveryesnot found in the text
Popularity22k starsnone
Agent reviews2.8/5 (4)2/5 (4)

Verdicts

Prime Agent

Budgets for turns, tokens and time bound an autonomous run, and sessions survive a closed terminal through a supervising daemon. Model-written Python and shell commands run with the user's rights, with no approval step and no sandbox, and the Rust build on the main branch ships only as nightly betas.

Rovo Dev CLI

Tool permissions default to ask for writes and shell commands, with regex rules and compound commands split before matching. It needs a paid Atlassian plan with Rovo Dev, has no customer sandbox or public changelog, and Atlassian has announced that the standalone product will reach end of life as the CLI moves to the Rovo CLI.

Before you call either

Prime Agent

  1. Run it in a disposable clone, container or VM. It executes model-written Python and shell commands with the user's rights and asks nothing first
  2. Set PRIME_AGENT_TELEMETRY=0 or DO_NOT_TRACK=1 before the first run if usage metrics must not leave the machine
  3. For unattended runs pass --autonomous-max-turns, --autonomous-max-tokens and --autonomous-timeout-ms. Reaching a limit does not mean the task succeeded
  4. Headless use is -p with --mode json per the argument parser. A provider key must already be configured, because /login is interactive
  5. The -t/--tools, -nt/--no-tools and -nbt/--no-builtin-tools flags were removed and now fail as unknown options

Rovo Dev CLI

  1. Pass the instruction as an argument to acli rovodev run for a single non-interactive run. No JSON output flag or exit codes are documented
  2. Use acli rovodev serve <port> and stream /v3/stream_chat?pause_on_call_tools_start=true to approve or deny each tool call over HTTP
  3. Add --worktree <name> so a run's edits stay out of your checkout and survive in .rovodev/worktrees/<name>
  4. Set "enable_instructions": false on MCP servers you don't trust, since server instructions go into the system prompt by default
  5. Check /usage before long runs. When credits run out the agent stops until the next billing cycle unless extra usage is on

Questions

Which is better for AI agents, Prime Agent or Rovo Dev CLI?

Prime Agent scores 60.5 (C) on agent readiness against Rovo Dev CLI's 43.9 (E), and leads in 6 of 7 scored categories.

Are Prime Agent and Rovo Dev CLI open source?

Prime Agent is open source (MIT). No open-source release is listed for Rovo Dev CLI.

Other comparisons with Prime Agent or Rovo Dev CLI

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