Windsurf vs Vellum
Compare coding AI Tools
Windsurf is an agentic IDE that blends chat, autocomplete, and the Cascade in-editor agent to understand your codebase, propose edits, and reduce context switching for developers working on real repositories across Mac, Windows, and Linux.
Vellum is an AI agent building platform that combines a prompt playground, evaluation tools, and hosted agent apps so teams can iterate on LLM workflows with debugging and knowledge base support, starting with a free tier and upgrading for more credits.
Feature Tags Comparison
Key Features
- Cascade agent: Uses project context to propose edits across files and help you iterate through coding tasks inside the IDE
- Tab autocomplete: Generates code completions from short snippets to larger blocks while aiming to match your style and naming
- Full contextual awareness: Designed to keep suggestions relevant on production codebases by using deeper repository context
- Fast Context mode: Optimizes how context is gathered so the assistant can respond quickly during active development sessions
- Preview workflow: Run and preview changes in a guided flow to validate behavior and reduce surprises before sharing code
- Deploy workflow: Push changes through a built-in deploy path so you can move from edit to runnable result with fewer steps
- Free and Pro plans: Pricing starts at $0 with 50 credits and Pro at $25 with 200 builder credits so solo builders can scale testing
- Prompt playground: Compare models side by side and iterate prompts systematically instead of relying on subjective testing
- Evaluations framework: Run repeatable quality tests at scale to detect regressions and track improvements across prompt versions
- Hosted agent apps: Share working agents with teammates through hosted apps for demos
- reviews
- and stakeholder feedback cycles
Use Cases
- Refactor across modules: Ask Cascade to apply a consistent rename or API change and review its file edits before merging
- Feature scaffolding: Generate starter routes data models and tests so you can move from idea to runnable code with fewer steps
- Bug triage help: Point the agent at an error and request a minimal fix plus a brief rationale you can verify in code review
- Codebase onboarding: Use repository aware chat to learn where key logic lives and how the project is structured in minutes
- Prototype and preview: Iterate on UI or service changes then use the preview flow to validate behavior before sharing broadly
- Small deployment loops: Use deploy tooling to push a change and confirm it runs without leaving the editor workflow for checks
- Agent prototyping: Build an agent by chatting with AI then refine logic with low code steps and controlled prompt versions
- Prompt iteration: Compare LLM outputs side by side and select prompts that improve accuracy and reduce unwanted variation
- Regression testing: Run evaluations on a saved dataset before release to catch quality drops after model or prompt changes
- RAG apps: Attach a knowledge base and test retrieval behavior with representative questions and strict document scope rules
- Stakeholder demos: Publish hosted agent apps so product and compliance reviewers can test behavior without local setup steps
- Model selection: Evaluate providers and self hosted options with the same tasks to choose the best cost and latency mix for production
Perfect For
software engineers, full stack developers, startup builders, platform engineers, engineering managers evaluating AI IDE rollout, teams needing cross platform Mac Windows Linux tooling
product managers, ML engineers, software engineers, data scientists, AI platform teams, prompt engineers, QA and reliability teams, startups building LLM features, teams shipping agent workflows
Capabilities
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