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Unified Messaging API vs Unified.to

Zavu adds AI-agent-first setup, deterministic routing and built-in usage credit, while Unified.to focuses on generic API integration.
Unified Messaging APIOne API for WhatsApp, SMS and Email. Deterministic routing and predictable pricing at infrastructure level.Unified.toOne API to Integrate Them All

Side by side

What it is
Unified Messaging API:Unified Messaging API for WhatsApp, SMS, voice, email and other channels via a single endpoint.
Unified.to:Unified.to provides a real-time unified API and MCP to integrate 940+ B2B SaaS services with a single endpoint.
Best for
Unified Messaging API:One API for all messaging channels
Unified.to:Real-time unified API for SaaS integrations
Who it’s for
Unified Messaging API:Developers building AI agents, notifications and multi-channel messaging applications.
Unified.to:Developers building B2B SaaS or AI apps that need live access to multiple third-party data sources.
Pricing
Unified Messaging API:Freemium
Unified.to:Paid
Plans
Unified Messaging API:Free $0/mo · Pro $20/mo per month
Unified.to:Grow $750+ per month · Pro $1,500+ per month · Scale $3,000+ per month
Open source
Unified Messaging API:Yes, 0 GitHub stars
Unified.to:Yes, 0 GitHub stars
Works with
Unified Messaging API:TypeScript, Python, Ruby, Go, PHP, OpenAPI, OpenAI, Anthropic
Unified.to:Typescript, Python, PHP, Java, C#, Ruby, Go, React
DevHunt upvotes
Unified Messaging API:0
Unified.to:37
Launched on DevHunt
Unified Messaging API:Jan 2026
Unified.to:Jan 2023

Unified Messaging API features

  • Single unified API. Send and receive WhatsApp, SMS, voice, email, Telegram, Instagram, Messenger and more with one integration.
  • Deterministic routing. Automatic fallback routing (e.g., WhatsApp → SMS) without code changes.
  • Agent-first workflow. CLI, dashboard and AI-agent driven setup for senders, numbers and functions.
  • Built-in usage credit. Free plan includes $2 credit; Pro adds $20 monthly credit for SMS, voice and email.
  • SDKs & OpenAPI. Typed SDKs for TypeScript, Python, Ruby, Go, PHP and a generated OpenAPI spec.
  • Pay-as-you-go pricing. Transparent per-event rates for SMS, voice, email and WhatsApp templates with no markup.
Unified Messaging API on DevHunt →Alternatives

Unified.to features

  • Unified API & MCP. Single API layer with unified objects, scopes, and write endpoints for AI agents.
  • Real-time Pass-through. Requests hit source APIs live, no caching or sync jobs.
  • Zero-storage Architecture. Stateless traffic, no data at rest, regionalized for compliance.
  • Custom Fields & Objects. Read/write custom fields and objects across integrations like Salesforce.
  • Native & Virtual Webhooks. Unlimited webhook subscriptions with instant or polled updates.
  • Embedded Auth & SSO components. Ready-to-use UI for account linking, OAuth2, and single sign-on.
Unified.to on DevHunt →Alternatives

Based on each tool's website and DevHunt data. Details may change; check the official sites.