PostalDataPI
Smarty
Melissa Data Quality
Frill
Canny.io
Featurebase
productboard
Upvoty
UserVoice
Nolt.io
FeedBear
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.
PostalDataPI FrillFrill.co is particularly recommended for product managers, SaaS companies, and startups looking to prioritize and manage user feedback effectively. It is also beneficial for teams looking to enhance customer interaction and transparency by clearly communicating product development progress and updates.
We are using Frill to collect user feedback and feature requests, as well as post announcements about new feature updates to our users.
I love how easy it was to connect Frill with our own system, including SSO support for seamless users authentication. We also integrated the Frill widget right into our product user's dashboard so it's easy to distribute announcements and collect new feature ideas this way.
One of the most satisfying product experiences I've had with a tool for our business. Their customer support is top-notch as well.
Frill is thoughtfully designed and simple to use while offering a complex and powerful level of customizability. It integrates seamlessly into our web app and has become a crucial part of the feedback loop with our customers
Based on our record, Frill seems to be more popular. It has been mentiond 2 times 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.
What are your thoughts about setting up a frill? It'll make it super easy to see and have everything - all ideas and features with the proper organization, and users will be able to upvote features, see what's up, etc. Maybe put it on the sidebar too. Source: about 3 years ago
Right now, the only one that comes to mind is https://frill.co/. I reckon it might be free for what you need and how much you'd use it. But I'll keep noodling on other services that might fit the bill. Source: about 3 years ago
Smarty - Smarty provides address validation, autocomplete, geocoding and reverse geocoding services covering addresses in over 240+ countries.
Canny.io - Canny helps you collect and organize feature requests to better understand customer needs and prioritize your roadmap.
Melissa Data Quality - Melissa helps companies to harness Big Data, legacy data, and people data (names, addresses, phone numbers, and emails).
Featurebase - The all-in-one toolkit for managing your customer feedback.