LinearB's pricing page says Essentials is built for teams of 50 or more developers and bills at least 50 users, at $29 a user a month, billed annually.[1] At that minimum 5 engineers pay $1,450 a month; Zest charges $49 for the workspace.
LinearB acts on pull requests with programmable workflows and AI code reviews; Zest doesn't touch them. It reads each engineer's agent sessions and shows which ones ended in a merged pull request, with their tokens and cost.
Zest gets you:
Zest Pro: $49 a month for 5 engineers, seats included. LinearB, $1,450/mo for 5 engineers: Essentials at $29 a user a month, billed annually, for at least 50 users (read October 4, 2026).[1]
One workspace price at any team size, seats included
Claude CodeFable 5.1 (max) (with fallback)70.4 · Coding Agent Index
CodexGPT-6 Astra (max)67.0 · Coding Agent Index
Muse CodeMuse Spark 1.3 (xhigh)64.2 · Coding Agent Index
Grok BuildGrok 4.5 (high)64.1 · Coding Agent Index
Kimi Code CLIKimi K362.6 · Coding Agent Index
OpencodeGemini 3.8 Flash (high)61.2 · Coding Agent Index
Cursor CLIComposer 2.5 Fast38.3 · Coding Agent Index
Demo setups use current model families. The pairings above are the combinations benchmarked by Artificial Analysis; rankings measure performance, not popularity.
A plugin or extension in each engineer's coding agent reports every session: model, tokens, skills and MCP tools.
Detects AI activity across tools (active users, acceptance rates, AI-assisted PRs), with integrations for Claude, Codex, Cursor, Copilot and Devin.[2][3]
Facts from each vendor's own pages and AWS Marketplace listings, dated in the sources below. ✓ listed, – partly, × not listed on the pages we read, which is not proof the product lacks it.
LinearB's own size guidance
LinearB's pricing page describes Essentials as “built for engineering teams with 50+ developers” and Enterprise, at $59 a user, as built for 100+; each bills at least that many users, annually. Essentials supports GitHub Cloud only. A 45-day trial needs no payment method, so a small team can try LinearB before the minimum applies.
Automating pull requests vs reading the sessions behind them
LinearB's gitStream applies rules to pull requests: routing, approvals, labels, AI code review and generated descriptions. Zest doesn't comment on, route or block a pull request. It works upstream of it: which agent, model and skills produced the work, what each session cost, and how long its pull request took to merge. The two can run on the same repository.
Forecasting and capitalization are on Enterprise
Monte Carlo project forecasting, resource allocation and R&D cost capitalization come with LinearB Enterprise, not the $29 plan. Zest has none of them. Swarmia sells capitalization as an $18 module and includes it in its free plan under 10 developers, and the Jellyfish alternatives page compares seven tools on it.
TRY IT ON YOUR TEAM
See what your team ships with AI.
Starter is free (3 seats, no credit card). Pro is $49 a month with 5 seats and Max is $149 a month with 10 seats — priced per workspace, not per engineer, with extra seats at $19 a month.
Essentials is $29 per user a month and Enterprise $59, both billed annually, for at least 50 and 100 users, per LinearB's pricing page (checked October 4, 2026).
Can a team under 50 engineers use LinearB?+
Yes. The 45-day trial needs no payment method; once you buy Essentials, LinearB bills at least 50 users.
Does Zest review pull requests?+
No. Zest doesn't comment on or block pull requests. It measures the AI coding sessions behind them and what merged.