For not-for-profits, campaigns, and social justice organisations
The join form that turns supporters into members
Join Flow is an embeddable membership sign-up form for any organisation that maintains a membership list. It collects a new member's details, takes their first payment, and delivers them straight to your CRM — then forgets them entirely.
Everything a join flow needs
Paste one snippet into any page — including WordPress — and the form renders inline, inheriting your site's look. No iframe, no separate signup site.
Card and direct debit via Stripe and GoCardless. Monthly, yearly, or one-off membership tiers in GBP, EUR, or USD, with an optional extra donation at joining.
Every completed join is pushed to Action Network, Mailchimp, Zetkin, or Airtable — deduplicated by email, tagged on join, with your field mappings applied.
Member data is encrypted while a sign-up is in progress and deleted the moment it completes. Your members live in your payment provider and your CRM — nowhere else.
If a member closes the tab after paying, their join still completes automatically — payment webhooks and a recovery sweep finish the work without them.
Tiers, custom questions, consent checkboxes, colours, and every word of member-facing copy are set from a hosted dashboard. Nothing is hardcoded.
Built for organisations that run on people
Political parties, unions, campaign groups, charities, community organisations — if you keep a membership list and want people to join you online, Join Flow handles the sign-up so you can focus on organising.