Windsurf vs ellul
Editor with an agent, or computer for the agent.
Windsurf bundles a Cascade agent into a polished VS Code fork. Ellul is upstream of that: the persistent workstation an agent lives on, regardless of which editor you use to talk to it. They are not the same product.
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The fundamental difference
Windsurf is the editor with the agent baked in. Ellul is the computer that agent runs on. They compose: keep Windsurf as your editor, point its Cascade-CLI workflows at an Ellul workstation so the agent doesn't share your laptop's lid, credentials, or single-process bottleneck.
Where Windsurf is strong
Windsurf's Cascade agent and Cascade Memories give it a strong inline experience with an opinionated editor. If your work is keyboard-bound and short-cycle, the in-editor flow is hard to beat, particularly for engineers who want a Cursor-style experience under different ownership and pricing.
Where ellul is stronger
Anything where the agent's runtime matters: overnight runs, parallel agents on the same problem, real-credential operations, multi-day refactors, phone-as-keyboard for approvals while you're away. The thing Windsurf doesn't address is the runtime. The agent still lives on your laptop and inherits your laptop's lifecycle and credentials.
Feature comparison
| Capability | Windsurf | ellul | Advantage |
|---|---|---|---|
| Where the agent runs | Your laptop | Persistent cloud workstation | |
| Survives lid close | no | yes | |
| Editor experience | VS Code fork (Cascade panel + memories) | Browser file browser + terminal | |
| Inline completions | Yes, native (Codeium roots) | Through agent chat | |
| Parallel agents | One Cascade session at a time | Multiple, with read-only peering | |
| Privileged action gating | OS-level prompts (skippable) | FIDO2 passkey, server-side enforced | |
| Where credentials live | Your machine (~/.aws, ~/.ssh, 1Password CLI) | Server vault, never in agent process | |
| Long-running tasks (8h+) | Laptop must stay open | Close laptop, agent keeps working | |
| Phone access | no | Yes (chat, files, approvals) | |
| Bring-your-own-model | Proprietary stack with some BYOK | Any agent CLI; BYOK supported | |
| Open-source editor base | Forked from VS Code (open core) | Editor-agnostic (Cursor, Claude Code, OpenCode, Codex all work) | |
| Vendor independence | Tied to Cascade + Codeium models | Model-agnostic; agent-agnostic |
Pricing
| Tier | Windsurf | ellul |
|---|---|---|
| Hobby / Pro | Free / Pro $15/mo | $20/mo (Hobby), $50/mo (Pro) |
| Teams | Teams pricing via Windsurf sales | Per-seat (contact) |
| Bring-your-own-model | Limited | Yes |
Verdict
Windsurf for the editor; Ellul for the agent's runtime. Compose them.
If you like Windsurf's in-editor flow, keep using it. Move the heavy agent work (overnight runs, parallel agents, anything that touches production) onto an Ellul workstation. They solve different problems and stack cleanly.
When to use each
Use Windsurf when
- You want a Cursor-style editor under different ownership and prefer Codeium's model stack.
- Your work is short-cycle, in-editor, and keyboard-bound.
- You don't run agents unattended, and your credentials live happily on your laptop.
- You want an opinionated editor with a built-in agent rather than composing your own stack.
Use ellul when
- You want to kick off a long task and walk away from the keyboard.
- You want multiple agents in parallel: coding, reviewing, documenting.
- Your agent needs real credentials (GitHub, Vercel, production DB) and you don't want them on your laptop.
- You want to approve actions from a phone.
- You're tired of long jobs stopping when you close the lid.
Common questions
Can I use Windsurf with Ellul?
Yes. Windsurf stays where it is, on your laptop, for the inline editor flow. Whichever agent CLI you prefer (Claude Code, Cursor's Agent CLI, Codex, OpenCode) points at an Ellul workstation so the agent itself runs on a persistent server. You keep the editor; the agent moves.
Why not just buy Windsurf Teams?
Windsurf Teams gives you better usage on Cascade and team features inside the editor. It does not give you a place for the agent to run when you close the laptop, parallel-agent peering, or passkey-gated production access. Those are runtime concerns; Windsurf is an editor.
Does Windsurf's Cascade agent work as well as Cursor's Composer?
Both have improved sharply through 2025 and 2026. Day-to-day, most reviews call it a near-tie on editor agent quality, with each ahead in different micro-cases. The decision between them is rarely about agent quality and usually about ecosystem preference (model stack, pricing, ownership).
Will Windsurf launch a cloud product?
Possible. Codeium's lineage is in self-hosted enterprise inference, and they've experimented with cloud workspaces. If Windsurf ships a competing always-on, parallel-agent, passkey-gated workstation, the comparison will narrow. Until then, Windsurf is local-first and Ellul is the runtime layer.
Is the Cognition acquisition relevant here?
Cognition (the company behind Devin) acquired Windsurf in 2025. It changed Windsurf's ownership and roadmap, not its architecture: Windsurf is still a local-first VS Code fork. Devin and Windsurf are still distinct products with different deployment models.
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Try it
Move your agent off your laptop.
Hobby is $20/month. Pro is $50/month. Bring any agent: Claude Code, Codex, Cursor, OpenCode.
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