You have lots of options when choosing MMS or AMS. From Wild Apricot to Member Clicks, or Personify - all viable options. But if you need to scale to hundreds of thousands of members, have recurring memberships, organizational memberships and need full features of seasoned large scale enterprise AMS, it’s possible you might hit some limits with new kids on the block. Proprietary vendors are companies first and communities second. Tendenci is community first, and yes, there is a small company behind it. It’s just grown far bigger than we were expecting, and given it started in 2001, when you switch from proprietary solution it's an upgrade!

Feel free to take the demo site for a spin! Every site looks completely unique using Bootstrap themes. No long term contracts. Access to all of YOUR data at any time. Full access to source code. Everything under YOUR domain name. With Tendenci, you can self-host, host with us, leave whenever you want. If Tendenci isn’t the right AMS to manage YOUR memberships, you are free of constraints!

Let's talk! Give us a call at (281)497-6567 Contact Us Now at www.tendenci.com/contact Free Demo https://demo.tendenci.com

API for US ZIP, ZIP+4, and Canadian postal code data. One unified endpoint set covers North America — no separate APIs by country or data type.

What it does

• Address validation and standardization — production-grade parser with ZIP+4 append, refreshed monthly
• Radius search — centroid haversine and true spatial polygon intersection. Returns ZIPs/FSAs within range, with per-result pct_inside overlap percentage for spatial queries
• Unified lookup endpoint — accepts US ZIP, ZIP+4, Canadian FSA, full Canadian postal codes, or latitude/longitude inputs
• Autocomplete/typeahead — cities, counties, metros, states, FSAs, ZIPs
• Point-to-point distance — between any two postal points
• Census ACS demographics — 2011–2024, 542 fields per ZIP across income, education, housing, social, and economic profiles
• Boundary lookups — Census tracts, congressional districts, state legislative areas, school districts — with computed intersection percentages per ZIP

What makes it different

• Licensed commercial data — not commodity or scraped sources
• Canadian postal coverage — most peers in this space are US-only
• True spatial radius — not just centroid haversine
• 14 years of historical ACS depth via API — unusual outside of raw Census downloads
• One endpoint for all of North America — no country-detection or input-routing logic to maintain on the client side

Pricing

• Free — 2,500 lookups/day, no credit card required, no expiry
• Developer — $49/mo, 100K credits, 300/min
• Professional — $149/mo, 350K credits, 300/min
• Business — $499/mo, 1.5M credits, 600/min
• Credit packs — one-time, from 25K ($19) up to 2M ($799)

Resources

• Docs
• OpenAPI spec
• Postman collection