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Donor Thank-You Writer for Stripe · Nonprofit

Thank online donors within minutes of their Stripe gift

When a Stripe donation succeeds, AI writes a personal thank-you with your receipt wording and logs the gift in HubSpot. Monthly donors are thanked on their first gift and yearly.

Coming soon — waiting for Stripe approval $89 one-time · never renewsIncluded in Enterprise
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Can't be bought yet: waiting for Stripe approval. It opens for purchase on its own once approved.

  • Starts from an event in a connected app
  • 1 AI step
  • A person approves before it acts
  • About 20 min to set up

Sound familiar?

The job, before and after this agent.

What it feels like today

  • “Online donors get Stripe's receipt and nothing personal from us.”
  • “Monthly donors get the same thank-you every single month.”
  • “A large online gift sat unnoticed for a week.”

What you get with the agent

  • Starts the moment a Stripe payment succeeds and keeps only payments matching your donations rule.
  • Writes a personal thank-you naming the amount and what it supports, with your receipt wording copied word for word.
  • Creates or updates the donor's HubSpot contact and logs every gift on their timeline.
  • Alerts Slack to major gifts for a call, and to gifts without an email for a note by hand.
  • Thanks monthly donors on their first gift and then once a year; every thank-you waits for approval by default.

Before

Your Giving Tuesday donations arrive overnight. Each donor gets a payment receipt, and the personal thank-yous trickle out over the next two weeks.

After

Within minutes each donor has a warm, approved note about the fund they chose, the gift is on their HubSpot record, and the major gift is already flagged in Slack.

How it works

The whole workflow, step by step.

The moment a Stripe payment succeeds, AI checks it against your donations rule and writes a personal thank-you that names the amount and what it supports, adding your own receipt wording word for word with only the blanks filled in. The donor's HubSpot contact is created or updated and every gift is logged on their timeline. Major gifts and gifts without an email address are posted to Slack so someone calls or writes by hand. Monthly donors are thanked on their first gift and then once a year (remembered 365 days), not every month. By default every thank-you waits for approval. It drafts and organises for a person to approve and makes no tax decision.

  1. TriggerNew successful payment in Stripe
  2. LogicThanked this donor this year?
  3. AI stepWrite the thank-you
  4. LogicA donation?
    • Not a donation:Not a donation
    • Donation:Call this donor?
    • Donation:Email address?
  5. OutputNot a donation
  6. LogicCall this donor?
    • Major gift or no email:Alert the team in Slack
    • No call needed:No call needed
  7. App callAlert the team in Slack
  8. OutputTeam alerted
  9. OutputNo call needed
  10. LogicEmail address?
    • No email:No email address
    • Has email:Create or update the donor in HubSpot
    • Has email:Review first?
  11. OutputNo email address
  12. App callCreate or update the donor in HubSpot
  13. App callLog the gift on the contact
  14. OutputLogged in HubSpot
  15. LogicReview first?
    • Send without review:Email the thank-you
    • Review first:Approve the thank-you
    • Thanked this year:Monthly gift logged
  16. Human approvalApprove the thank-you
    • Approved:Email the thank-you
  17. OutputEmail the thank-you
  18. OutputMonthly gift logged
  19. LogicRemember the thank-you
  20. OutputThank-you sent

This is the workflow that opens in your workspace when you set the agent up. Every step can be edited.

  1. Step 1New successful payment in StripeStarts a run the moment a Stripe charge succeeds (checkout, payment links, invoices and subscriptions) through a webhook Fluxo Flow adds to your Stripe account.
  2. Step 2Thanked this donor this year?Reads when this donor was last thanked (remembered for a year), so a monthly donor is thanked on the first gift and then once a year, not every month.
  3. Step 3Write the thank-youAI checks the payment is a donation (your rule), writes a personal thank-you that names what the gift is for with your receipt wording, and decides whether it needs a person (major gifts always do) or was already thanked this year.
  4. Step 4A donation?Payments that don't match your donations rule (sales, fees, tickets…) stop here.
  5. Step 5Not a donationThe payment didn't match your donations rule; nothing is sent or logged.
  6. Step 6Call this donor?Major gifts and gifts without an email address are posted to Slack so a person calls or writes by hand.
  7. Step 7Alert the team in SlackPosts “call this donor” (major gift) or “thank by phone or letter” (no email) with the details from the payment.
  8. Step 8Team alertedThe run history keeps the alert that was posted.
  9. Step 9No call neededNot a major gift and the donor has an email address: no Slack alert.
  10. Step 10Email address?Gifts without an email address are thanked by hand; the rest are logged in HubSpot and get the thank-you email.
  11. Step 11No email addressNo email or CRM contact can be created; the Slack alert asks for a call or letter.
  12. Step 12Create or update the donor in HubSpotFinds the donor's HubSpot contact by email (or creates it) with their name.
  13. Step 13Log the gift on the contactAdds a note with the amount, date, purpose and reference to the donor's HubSpot timeline.
  14. Step 14Logged in HubSpotThe run history keeps the contact id and the note.
  15. Step 15Review first?Monthly gifts already thanked this year are only logged. With review switched on (the default) every thank-you waits for approval; with it off, major gifts and unusual gifts still do.
  16. Step 16Approve the thank-youA person checks the thank-you and the receipt wording in Reviews, edits them if needed and approves; nothing is sent before that.
  17. Step 17Email the thank-youSends the thank-you (with your receipt wording) to the donor from your workspace's sender, with replies going to your development inbox.
  18. Step 18Monthly gift loggedA monthly donor already thanked this year: the gift is logged in HubSpot, no new email.
  19. Step 19Remember the thank-youRemembers when this donor was thanked (kept 365 days), so their monthly gifts aren't thanked again until next year.
  20. Step 20Thank-you sentThe run history keeps the thank-you that was sent.

Example run

What goes in, and what comes out.

Example with fictional data

Comes in

Stripe payment (fictional): $75 monthly gift from Lena Park, description “Donation: Shelter Beds”, first payment.

The agent produces

Thank-you drafted for her first monthly gift to Shelter Beds with your receipt wording, gift logged in HubSpot, next thank-you due in a year. Waiting for approval.

What you need

Everything it takes to run it.

About 20 minutes from purchase to live. A checklist above the canvas takes you through each step.

Plan

Included in Enterprise; on other paid plans it's $89 once. Agents run live on paid plans, from Basic ($39/mo).

Your AI key

Connect any of 14 AI providers on your own key. Your provider bills usage directly, at cost; we add no markup.

Apps

Checklist

  • A paid plan (agents run live on paid plans).
  • An AI provider key (Settings → AI Providers).
  • Stripe, HubSpot and Slack, connected in Settings → Integrations. Stripe is waiting for vendor approval, so this agent switches on once it's live.
  • Your own receipt wording and a rule for which payments are donations.

Setup, about 20 minutes

  1. Connect your AI provider. The AI steps run on your own key (OpenAI, Anthropic, Google and more). Add one in Settings → AI Providers.
  2. Connect Stripe. Connect Stripe (Settings → Integrations → Stripe) with a restricted key that can read events and charges and write webhook endpoints.
  3. Connect HubSpot. Connect the HubSpot account your donors are kept in (Settings → Integrations → HubSpot).
  4. Connect Slack. Connect the Slack workspace your development team uses (Settings → Integrations → Slack).
  5. Pick your Stripe account. Open the trigger and pick the Stripe account donations are paid into.
  6. Describe your organisation and paste your receipt wording. Open “Write the thank-you” and replace the placeholder with your funds, signer, major-gift amount, donations rule and receipt wording.
  7. Pick your HubSpot account. Pick the same HubSpot account in “Create or update the donor in HubSpot” and “Log the gift on the contact”.
  8. Pick the Slack channel. Open “Alert the team in Slack” and pick your account and channel. Invite the app to private channels first (/invite @Fluxo Flow).
  9. Add your development inbox. Open “Email the thank-you” and enter the address donors' replies should go to.
  10. Test it with Dry Run. Press Dry Run: the agent runs on sample data with no messages sent and nothing written to your apps.
  11. Switch the trigger on. Open the trigger and click “Activate app trigger”: Fluxo Flow adds a webhook endpoint to your Stripe account, and payments from then on are picked up at once.

Is it a fit?

Who it's for, and what it won't do.

Built for

  • Nonprofits taking online donations through Stripe
  • Development staff managing monthly giving programs
  • Small charities using HubSpot as their donor CRM

What it doesn't do

  • It drafts and organises for a person to approve; it makes no tax decision — it never decides whether or how much of a gift is tax-deductible, and gifts with something received in return are flagged for you.
  • The receipt wording is yours and isn't tax or legal advice; have your accountant confirm your template.
  • Recurring gifts are thanked on the first gift and then once a year, not every month.
  • It doesn't create deals or donation records in HubSpot, and payments made before activation aren't processed.
  • It never invents amounts, impact figures or promises.

We list the limits up front so you can decide before you buy.

Price

$89 one-time

Per workspace. It never renews.

Coming soon — waiting for Stripe approval
  • Included at no extra cost on Enterprise.
  • Buying and running it live need a paid plan, from Basic ($39/mo).
  • Dry Run costs nothing: simulated AI and app calls, nothing sent.
  • AI usage is billed by your own provider, at cost. No AI credits to buy from us.
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One-time agent purchases aren't covered by the 30-day money-back guarantee. Refund policy

FAQ

Questions about Donor Thank-You Writer for Stripe.

Which apps does it need?

Stripe, HubSpot and Slack. The sheet-based Donor Thank-You Writer does the same job from a Google Sheet. The agent's page shows whether each app is ready to connect.

Does it decide what's tax-deductible?

No. It makes no tax decision; the receipt is your own wording with only the blanks filled in, and gifts with something received in return are flagged for a person.

My Stripe account takes other payments too.

Write a donations rule, such as a description, metadata or a specific payment link. Other payments are ignored.

What does it take to run?

About 20 minutes of setup, a paid plan and your own AI provider key; Dry Run is free. It's a one-time purchase that never renews.

Does it decide what is tax-deductible?

No. The receipt section is your own wording, copied word for word with only the blanks filled in from the payment. Gifts where the donor received something in return are flagged for a person to decide.

What about monthly donors?

They're thanked on their first gift and then once a year; every monthly gift is still logged in HubSpot. It remembers each donor's last thank-you for 365 days.

My Stripe account also takes non-donation payments.

Write your donations rule in the organisation section (e.g. description or metadata contains “donation”, or a specific payment link); other payments are ignored.

Is this a subscription?

No. Donor Thank-You Writer for Stripe is a one-time purchase of $89 per workspace and never renews. The Enterprise plan includes it at no extra cost. Running it live needs a paid plan (from Basic ($39/mo)), and your AI provider bills you directly for usage.

Can I test it before it touches real data?

Yes. Once it's set up in your workspace, Dry Run plays every step on sample data with simulated AI and app calls: nothing is sent and nothing in your apps changes. Switch the trigger on only when you're happy.

Donor Thank-You Writer for Stripe is almost ready.

Can't be bought yet: waiting for Stripe approval. It opens for purchase on its own once approved. Create a free account now and you'll find it on your Agents page.

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