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Cline

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Cline is an open-source, model-agnostic AI coding agent for VS Code, JetBrains, Cursor, and CLI.

Protection under test
Assessed 30 July 2026 · Evidence as of 30 July 2026
Something worth protecting exists and is being tested right now.
On the recordSince 30 July 2026 · Checkable from early 2027 · Every call on the record Checkpoint: Series B or down-round decision likely given July 2025 raise and typical 18-24 month runway
The call

Cline holds a real compliance-and-neutrality niche in AI coding agents, but free native agents from OpenAI, Anthropic, and Google are closing in on the same ground.

Cline is a free, open-source tool that helps AI models write code by managing tasks and keeping track of what the code is doing. It was built to appeal to companies in banking, healthcare, and other regulated industries that need to control which AI models they use. However, competitors like Cursor, GitHub Copilot, and Claude Code are larger and more popular, and now OpenAI, Google, and Anthropic are adding similar features directly into their own AI models for free. The big question is whether companies will stick with Cline because it lets them choose their own AI model, or whether they will switch to these bigger companies' tools that come bundled with their models included.

Why
01
AI pressure: OpenAI Codex CLI, Anthropic Claude Code, Google Antigravity. Frontier labs now ship free native coding agents inside their own tools, squeezing the neutral-shell niche Cline built its business on. Could AI do the core job? Yes, likely.
02
Bigger players: Cursor (Anysphere). Cursor's paid agent already sits inside 64% of Fortune 500 accounts, competing directly for the same enterprise coding-agent budget. Could a giant copy it? Yes, easily.
03
What protects it. Open-source, bring-your-own-key neutrality plus multi-editor reach give compliance-conscious buyers a vendor-agnostic option the labs don't sell.
What would change this call
Whether Cline closes a follow-on funding round or reports a down-round by early 2027. Shows if investors still believe the enterprise wedge can outrun free frontier-lab agents.
Whether Cline's Kanban feature exits 'research preview' to general availability in 2026. Indicates whether the enterprise compliance/stickiness feature is maturing or stalling.
Whether named Fortune 500 customers like Samsung or SAP are confirmed as paying accounts with renewed contracts. Tests if enterprise adoption claims translate into durable, non-vendor-stated revenue.
Key numbers
  • $32M total raised, including $27M Series A (2025-07-31)
  • $110M post-money valuation (2025-07)
  • 35 employees, 40% YoY headcount growth (2026-06-26)
Named risks
  • Talent departure to OpenAI following disputed January 2026 acqui-hire episode. Severity: high
  • Web traffic reportedly down about 100% quarter over quarter as of June 2026. Severity: high
  • Zero-markup, pass-through revenue model leaves thin margins versus funded rivals. Severity: medium
  • Kanban product had critical websocket hijack vulnerability disclosed May 7, 2026. Severity: medium
  • No funding raise since July 2025 amid intensifying competition from well-capitalized rivals. Severity: medium
Rivals, as read in July 2026
RivalDirectionEvidence
Cursorlosing toCursor at ~$2B ARR and 64% Fortune 500 use vs Cline's ~$5M ARR by Feb 2026
Claude Codelosing toClaude Code hit ~18% workplace adoption and ~54% of enterprise AI-coding spend in 2026
GitHub Copilotlosing toCopilot held ~29% workplace adoption per JetBrains survey, Jan 2026
Kilo CodecontestingKilo actively markets itself as the Cline alternative after Jan 29 2026 OpenAI rumor
OpenAI Codex CLIgaining onCodex CLI got Rust rewrite and free goal mode GA around May 2026, matching Cline's turf
Questions people ask
Is Cline profitable in 2026?
No public profitability claim exists. Sacra estimated Cline's annual recurring revenue at roughly $5M as of August 2025, and its model relies on zero-markup, bring-your-own-key inference pass-through, meaning most revenue comes from thin licensing and enterprise seat fees rather than gross margin on AI usage.
Could AI labs replace Cline's product?
Cline's core value is an orchestration shell around AI models, and OpenAI's Codex CLI got a Rust rewrite plus GA goal mode around May 2026, while Google shipped Antigravity CLI and Anthropic released Claude Sonnet 5 on June 30, 2026, all bundling similar agent features free.
Did OpenAI acquire Cline?
No confirmed full acquisition. On January 29, 2026, reports suggested OpenAI acqui-hired Cline's team into its Codex org; Cline publicly denied a corporate transaction while confirming some team members moved to OpenAI, leaving the episode disputed as of that date.
Who is Cline's biggest competitor?
Cursor (Anysphere) reportedly reached about $2B in annualized revenue with over 1M paying users and 64% Fortune 500 penetration by February 2026, dwarfing Cline's estimated $5M ARR. Claude Code and GitHub Copilot also outpace Cline in enterprise adoption as of 2026.
How much funding has Cline raised?
Cline raised $32M total across Seed and Series A rounds, with a $27M Series A closing July 31, 2025, led by Emergence Capital with participation from Pace Capital and angels including Logan Kilpatrick and Addy Osmani, at a $110M post-money valuation.
What is Cline's business model?
Cline is free and open-source under Apache 2.0, monetizing through bring-your-own-key inference pass-through with no markup, a roughly $9.99 per month ClinePass subscription, and a Cline Teams enterprise tier for org management and compliance, launched alongside its Series A in July 2025.
Timeline
  • 2026-06-30Anthropic releases Claude Sonnet 5, positioned for frontier coding and agent performance
  • 2026-05-12Cline adds multi-agent Teams feature to its SDK for coordinated sub-agent work
  • 2026-05-07Oasis Security discloses critical websocket hijack vulnerability in Cline Kanban, later patched
  • 2026-03-26Cline launches Kanban research preview for local multi-agent orchestration
  • 2026-02-03Cline launches CLI 2.0 with parallel-agent execution and ACP integration
  • 2026-01-29OpenAI acqui-hire rumor surfaces; Cline denies corporate transaction, confirms some staff moved
  • 2025-07-31Cline closes $27M Series A led by Emergence Capital, launches Cline Teams
Revision history
30 July 2026
First assessed. Protection under test. The text above is fixed as of this date and is not edited afterwards.
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