
Api.ai
Dialogflow
Botpress
Messenger Platform
IBM Watson
IBM Watson Assistant
Tars
Rasa Core
PostalDataPI
Smarty
Melissa Data Quality
PostalDataPI is a global postal code validation and enrichment API covering 240+ countries and territories. One API, one key, one flat rate โ $0.000028 per query with no tiers or subscriptions.
What you get back: Up to 18 metadata fields per postal code โ city, state/region, coordinates, timezone, three levels of administrative hierarchy, elevation, and more. Sub-5ms cached responses.
Works everywhere: US ZIP codes, UK postcodes, German PLZ, Japanese postal codes, Canadian FSAs, and 230+ more. Format normalization handles case, spacing, and hyphen variations automatically.
Get started in 60 seconds: 1,000 free queries on signup, no credit card required. SDKs for Python and Node.js. MCP server for AI agents (Claude, Cursor, etc.).
Built for developers: REST API, consistent JSON responses across all countries, OpenAPI spec, llms.txt for AI agent discovery.
PostalDataPIBased on our record, Api.ai seems to be more popular. It has been mentiond 1 time since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
Also, when I try to find more help in the AutoVoice documentation/help menu under the Advanced Commands section it points me to an outdated dead end: a now "private" YouTube video and the URL https://api.ai which is a dead URL. Source: over 3 years ago
Dialogflow - Conversational UX Platform. (ex API.ai)
Smarty - Smarty provides address validation, autocomplete, geocoding and reverse geocoding services covering addresses in over 240+ countries.
Botpress - Open-source platform for developers to build high-quality digital assistants
Melissa Data Quality - Melissa helps companies to harness Big Data, legacy data, and people data (names, addresses, phone numbers, and emails).
Messenger Platform - Discovery, chat extensions, and richer experiences
IBM Watson - Watson is the AI platform for business.