Cline vs Relay: Features, Pricing & Which Is Better (2026)
A side-by-side comparison of Cline and Relay — features, pricing, and ideal use cases — to help you decide which AI tool fits your workflow.
Cline
Cline Bot Inc
Open-source coding agent runtime that runs in your IDE, your terminal or embedded via SDK, works with any model, and asks approval on every step.
Key features
- One runtime, three surfaces: The same agent runs as a VS Code extension, a terminal CLI, or embedded in your own product through the SDK
- Model agnostic: Works with Claude, GPT, Gemini, local Ollama or LM Studio models and any OpenAI-compatible endpoint, using your own key or weights
- Plan then Act: Align on a strategy in Plan mode before execution, then approve each step in Act mode or flip on auto-approve
- Multi-file edits with undo: Coordinated changes across a project with linter-aware fixes, diffs, checkpoints and one-click undo on every step
- Live terminal execution: Runs bash commands and reacts to output as it appears, handling dev servers, test runs and deploys
- Rules and Skills: Ship .clinerules with the repo so the agent follows your coding standards, architecture and deployment conventions
- Multi-agent teams: Coordinator agents delegate to specialists with their own tools and context, and can run on cron for recurring automation
- MCP and integrations: Register MCP servers and custom tools, chat from Slack, Discord, Telegram or Linear, and run headlessly in GitHub Actions or GitLab
Best for
- A developer onboarding to an unfamiliar codebase and asking the agent how files, dependencies and behaviour fit together
- Refactoring across a large repository while keeping imports, types and behaviour consistent
- Running recurring maintenance — dependency bumps, lint sweeps, scheduled checks — from cron or a CI pipeline
- A team that must keep code on self-hosted or local models for compliance reasons, pointing the agent at its own endpoint
- Embedding an agent loop inside an internal developer platform via the SDK instead of building one from scratch
- Encoding team conventions in .clinerules so every engineer's agent produces consistent, review-ready changes
- Triggering a coding task from Slack or Linear and having the agent open the resulting change
R
Relay
Relay
AI phone receptionist that builds itself from a business's website to answer every call and book, reschedule, or cancel appointments 24/7.
Key features
- One-Click Build: Paste a website and Relay drafts the agent profile, knowledge base, prompt, and call wiring in about 38 seconds.
- 24/7 Call Answering: Picks up every call day or night in the caller's local time, with no voicemail or hold music.
- Real Calendar Booking: Checks live availability and writes appointments, reschedules, and cancellations directly to the business's existing booking system.
- Booking Integrations: Connects to 7+ systems including Google Calendar, Square, Calendly, Outlook, Housecall Pro, Workiz, and Vagaro with one sign-in.
- Grounded Answers: Answers caller questions from the business's own facts and knowledge base rather than guessing.
- No-Config Setup: Requires no dashboards, prompt engineering, or manual call-flow building.
Best for
- Missed-Call Recovery: Capture bookings from calls that would otherwise ring out when staff are busy or closed.
- Appointment-Based Businesses: Let salons, clinics, and home-service providers automate booking, rescheduling, and cancellations by phone.
- After-Hours Coverage: Answer and book calls 24/7 without hiring overnight reception staff.
- Fast Agent Deployment: Stand up a working phone agent from a website link without engineering time.
- FAQ Handling: Answer common caller questions about hours, services, and pricing from the business's own information.