Coasty vs Relay: Features, Pricing & Which Is Better (2026)

A side-by-side comparison of Coasty and Relay — features, pricing, and ideal use cases — to help you decide which AI tool fits your workflow.

Coasty

Freemium

Computer-use AI agent and API (85.60% OSWorld) that browses, clicks and types across real desktop apps to finish work end-to-end.

Best-in-Class Computer Use: Ranked #1 on OSWorld at 85.60%, executing long-horizon tasks across real desktop applications.
Predict API: `/v1/predict` accepts a screenshot and returns the next action as structured JSON at $0.05 per call.
Always-On Virtual Machines: Persistent, always-on VMs let agents keep state between tasks and pick work up where they left off.
Agent Swarms: Run multiple agents in parallel to fan out across steps or accounts, cutting wall-clock time on repetitive work.
1,000+ App Integrations: Ships with native integrations to common productivity apps like Gmail and Slack out of the box.
Synthetic Trajectory Data: Delivers custom long-horizon multimodal training trajectories verified before delivery for enterprise buyers.

Back-Office Automation: Insurance, accounting and freight teams delegate repetitive desktop work — data entry, form filling, portal ops — to agents.
Autonomous Web Tasks: Consumers ask Coasty to book appointments, research options and complete purchases end-to-end.
Developer Automation: Engineers embed the Predict API into their own harnesses to build custom agentic workflows.
Healthcare Ops: Clinics use computer-use agents against legacy systems that lack modern APIs.
Data Collection at Scale: Enterprises order synthetic multimodal trajectories tuned to their apps for model fine-tuning.

Freemium

AI phone receptionist that builds itself from a business's website to answer every call and book, reschedule, or cancel appointments 24/7.

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.

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.