Google Opal vs Relay: Features, Pricing & Which Is Better (2026)
A side-by-side comparison of Google Opal and Relay — features, pricing, and ideal use cases — to help you decide which AI tool fits your workflow.
Google Opal
A Google platform for building, running, and sharing small AI-powered mini-apps and content transformation workflows.
Key features
- Mini‑App Templates: Provides ready-made mini-app starter projects (example: Article → LinkedIn post) with copy‑paste prompts and wiring to accelerate development of small, focused AI apps.
- Prompt & Wiring Instructions: Includes instruction files (miniapp_instructions.md) with example prompts, step wiring, and sharing notes so developers can reproduce and customize behaviors.
- Workflow Integrations: Documented fallbacks and example integrations with workflow tools such as n8n and Python scripts to run pipelines when Opal access is unavailable or to connect generated content to downstream systems.
- Developer‑First Repos: Official and community GitHub starter repositories that include demo code, n8n workflows, and quick‑start commands to bootstrap mini‑apps and share them publicly.
- Regional Beta Access Controls: Distributed as a gated public beta (noted as US‑only in the referenced materials), indicating controlled rollout and access management during early release.
- Content Transformation Primitives: Focused capabilities for converting input content into formatted outputs (summaries, social posts, etc.) with constraints such as length and tone encoded in templates.
- Web-hosted mini-app platform accessible via opal.withgoogle.com (public beta)
- Support for developer mini-apps with copy-paste prompts, step wiring, and sharing notes (mini-app starter repo)
- Example content transformation pipeline (article or raw text → LinkedIn-style post)
- Fallback integration examples using Python scripts and n8n workflows
- Docker Compose usage shown in community repos for local fallback runs
- Developer-focused starter templates and instructions in repositories (e.g., opal/miniapp_instructions.md)
Best for
- Article Repurposing: Convert a long-form article or blog post into a concise, engaging LinkedIn post with a punchy hook, bullets, and a CTA using a mini‑app template.
- Marketing Automation: Prototype and automate content pipelines that ingest source material, generate repurposed social content, and push outputs to content management or scheduling tools via n8n.
- Developer Prototyping: Rapidly build and iterate small AI apps for internal tools or customer demos using the provided starter repos and prompt wiring instructions.
- Fallback Workflows: Run equivalent generation flows locally via Python or in workflow orchestrators when Opal access is restricted (e.g., during regional beta limitations).
- Shared Mini‑App Catalog: Publish and share mini‑apps on GitHub to enable team collaboration and reuse of proven prompt templates and wiring patterns.
- Content Team Productivity: Enable non‑technical content creators to use developer‑provided mini‑apps for consistent, repeatable social and marketing content generation.
- Create micro-apps that transform articles or raw text into social posts or summaries
- Prototype prompt-driven workflows and share mini-apps with collaborators
- Run automation/ETL fallbacks using Python or n8n when direct Opal access is unavailable
- Embed or orchestrate content-generation flows inside CI/CD or Docker-based environments for testing
- Explore prompt templates and wiring patterns for rapid content automation
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.