Picture this

Who it is for

At a Lagos builder meetup, guests scan in at the door and tap phones to connect with people they meet. Weeks later, Femi opens his stub and sees the three people he promised to follow up with.

Two ways to own it

What you get

Base$149

$37 deposit to reserve

Check-in QR, attendee stubs, tap-to-connect, follow-up reminders, host analytics.

You choose: chain
You choose: name and logo
You choose: accent color

Customfrom $1,000

Built around you

Reshape it entirely: new features, your flows, your brand end to end, integrations you need. We scope it with you.

Everything in Base
Custom features and design
Priority build

Why it is new

What exists today, and what this does differently

What is new

Meeting proofs exist via POAP; bundling mutual connections into the attendance stub is a modest step.

Closest things out there

POAP offers "You Met Me" templates and meeting POAPs, and Luma handles check-in.

Checked with web searches in October 2026. A search is not proof that nothing similar exists, and the market moves fast, so we recheck before every build.

What it unlocks

The human in it

Mines relationships into a memory you own.

The Regatta Board

Races it can enter

buildathon · Base · upcoming

Base Batches

unknown for next cohort

Official page ↗

Consumer app; eligibility unknown, prior editions accepted existing projects.

Their rule on existing code: unknown; prior editions accepted early-stage teams including existing projects

hackathon · Devfolio · rolling

Devfolio hackathon listings

rolling

Official page ↗

Most events require building during the event.

Their rule on existing code: Varies per event; most require building during event

What you own

The whole app, not a starter kit.

The complete Event Stub app: meetup hosts check people in with live codes and attendees keep a stub that remembers who they met, with a paywall, host console and door agent built in.

Base price · $149

The user app, complete

Every buyer gets the same finished app. Basic branding and copy changes come through a quick form.

Three step onboardingHome

Shown once: a stub for every night, tap phones to add a dot, it remembers for you.

Tonight and next actionHome

Dots tonight, stubs collected, people in the room and one clear next step.

Live door codesDoor

Rotating codes at check in, with a registered guest, a forwarded screenshot and a walk in.

Two way tap linksConnect

Links count only when both people tap; one sided requests add nothing.

Follow up list and nudgeFollow up

Who you promised to follow up with and a nudge at your usual hour.

Next event and private notesFollow up

Which links are going next and private notes per link. Gated behind Stub Plus.

Stub collection and receiptsStubs

Every stub with what is and is never on chain; searchable history gated behind Stub Plus.

Plans and settingsMe

Pricing from the owner paywall, USDC checkout, quiet nudges, permissions and vision.

Open the full app demo

Add-on

Owner console

Your admin side: revenue, paywall editor, users, rules and the agent log.

Revenue and paywall editorRevenue

MRR, host plans, incoming USDC, accepted methods, live tier and gate editing.

Host event viewEvents

Check ins, walk ins, double check ins and follow up rates as counts only.

Event rulesRules

Door code mode, walk ins, nudge timing, next event visibility and network.

Door agent log and roadmapAgent

What the door agent got wrong and how it adapted, costs, plus the priced Roadmap screen.

Top-up

Growth and referrals

Referral and growth mechanics, switched on when you are ready to grow.

Host swap nights and invitesGrowth

Run a host swap night and track guests who bring new hosts.

The money path, built in

How it earns for you

Guests keep stubs free. Hosts pay a monthly plan for events and sponsor numbers, regular guests can pay for Stub Plus, and conference organisers pay for larger plans.

GuestFreeCheck in, a stub for every event, two way links, a follow up nudge

Stub Plus$3 a monthSee who from your links is going next, private notes, all your stubs searchable

Host$29 a monthUnlimited events, rotating door codes, follow up numbers for sponsors

No per guest fee. Stub gas on Base, Celo or Polygon is a few dollars a month.

Prices are yours to set. Illustrative, not a promise of income.

Growth loops, built in

How it spreads

Every stub carries the host's name and links to the next event
Tapping with someone not yet on the app invites them in one step
Hosts show follow up numbers to sponsors
Host swap nights that bring new cities
Share card after a meetup

Roadmap · build the next phase with us

Where it goes next

v1 included

The full stub app

Rotating door codes and walk in stubs
Two way tap links
Follow up nudges at the right hour
Stub history and receipts
Paywall, host console, door agent

Included

Conference mode

Multi track check in
Sponsor booths with opt in taps
Speaker stubs
Follow up analytics for sponsors

Add-on from $500

Community graph

City wide event calendar
Shared community stubs
Hiring board from mutual links
Grant reports for ecosystems

Add-on from $1,100

For investors and grant reviewers

The pitch, ready

Meetup hosts check people in and attendees keep a stub that remembers who they met there.

Problem: Meetups produce real connections that are forgotten by Monday, static QR tickets get forwarded, and hosts cannot show sponsors any outcome.

Solution: Rotating check in codes, a stub per event, two way tap links that count only when both people tap, and a follow up nudge timed to each guest, with hosts seeing counts only.

Why now: Phone wallets and cheap stubs on Base, Celo and Polygon make a keepsake per event practical, and builder communities are meeting in person again.

Market: Meetup hosts, community brands and conference organisers, and the builders who attend.

The ask: Pilot partners: five community hosts across Lagos, Accra and Nairobi, plus ecosystem community grants.

Funding is never guaranteed. Check each program's rules.

For hackathons and demo days

Your 2 minute demo

Home: Femi, 27, on the way to a Yaba builders night.
Door: his live code checks in; a forwarded screenshot is stopped; a walk in gets a stub.
Connect: three two way taps add dots; a recruiter's one sided request does not.
Follow up: who he promised to message and the nudge preview.
Stubs: his collection and receipts.
Owner Events: counts for sponsors, never names.
Owner Revenue: change the Stub Plus price and preview the Plans sheet.
Owner Growth and Roadmap: run a host swap night, then request conference mode.

Many hackathons require code written at the event. See the Regatta Boardfor each race's rule.

Make it entirely yours

Custom work from $1,000: your own branding and stub art, conference tracks, a CRM export for hosts, or a community branded deployment. Scoped on a call.

Custom from $1,000

BLUEPRINT

Why it matters and how it really works

The need

Meetups are where people find collaborators, jobs and co-founders, but most connections are lost by Monday. Hosts only see headcount, and guests leave with half-remembered first names.

What exists and what is new

Attendance and meeting proofs already exist: POAP offers event badges and 'You Met Me' style meeting templates, and Luma handles registration and door check-in. What Event Stub adds is modest: one stub per guest that bundles check-in with mutual, two-way tap connections, private notes and timed follow-up nudges, plus host analytics on connections rather than headcount. Research verdict: rare, medium novelty.

The data it runs on

Registrations from the host, rotating check-in codes signed per guest, attendance stubs, mutual link proofs as hashed pairs, and private notes kept on each guest's device. Names and contacts never go onchain.

1.The mission

Make the people you meet in a room as easy to remember and reach as the talks you saw.

2.Why people can't resist it

The dots Every two-way tap adds a dot to both stubs. People tap more when they can see the count grow.

The nudge A week later, at the hour you usually open it, the stub reminds you who you promised to follow up with.

Next event The stub shows who from your links is going to the next meetup, so people come back.

3.How it works for real

Sign in: Guests sign in with email or phone through Privy, which creates an embedded wallet for the stub. No seed phrases.

Check-in: Each guest's stub shows a QR that rotates every 30 seconds, signed by their stub key. The host's scanner app verifies it offline-tolerant.

Stubs: An attendance record minted as a soulbound token or an EAS attestation on Base, Celo or Polygon; gas is sponsored by the host through a paymaster.

Tap to connect: Phones exchange signed hellos over QR or NFC. A link is recorded only when both sign, stored as a hashed pair attestation.

Notes and nudges: Notes stay on device, encrypted backup optional. Push and email nudges are scheduled per guest's usual open hour.

Host dashboard: Counts of check-ins, walk-ins, links and follow-ups, aggregated. No who-met-whom by name.

4.Cost per use and pricing

Per guest per event: stub and link attestations on Base usually cost well under one cent each in gas, so a 150 person night with about 200 links costs roughly 1 to 3 dollars in sponsored gas. Push and email nudges add about 0.1 cents per guest. Hosting and the scanner app are fixed costs, around 20 to 50 dollars a month for a small operator. Check current gas and provider prices before launch.

Community Free up to 50 guests

Check-in, stubs, tap to connect, nudges.

Host 29 dollars a month

Unlimited events, walk-in stubs, rotating codes, connection analytics, branded stubs.

Series 99 dollars a month

Multiple hosts and cities, sponsor reports with aggregate numbers, CSV export of consenting guests.

5.Growth loop

Every stub carries the host's name and links to the next event. Guests who tap with someone not yet on the app invite them in one step. Hosts see follow-up numbers they can show sponsors.

6.Risks and guardrails

Privacy: Who met whom is sensitive. Only hashed pairs go onchain, names show only to people you tapped, and hosts see aggregates.

Harvesting: Recruiters or spammers scanning badges. A link needs both people to tap; one-sided scans add nothing.

Ticket sharing: Static QRs get forwarded. Rotating signed codes expire before a screenshot is useful.

Safety: Guests can hide from the room, remove links and block. Hosts can remove a guest's stub for code of conduct reasons.

Connectivity at venues: Scanner verifies codes offline and syncs later, so a weak signal does not stop the door.

7.Build order

Host creates an event and imports registrations
Guest stub with rotating check-in QR
Scanner app for the door with offline checks
Two-way tap to connect with private notes
Follow-up nudges at each guest's usual hour
Host dashboard with aggregate counts
Onchain stub and link attestations with sponsored gas

8.Where this is going

Now
One meetup, a smooth door and fewer lost connections.
Next
A series of meetups across a city, with stubs that show who you will see again.
Later
A portable record of the rooms you were in and the people you met, owned by you.
The big one
Local communities everywhere can prove the real-world ties they create, without giving their members' data away.

Costs and tools are estimates at the time of writing. General information only, not legal or financial advice.

OWNER PLAYBOOK

Own it, then chart your voyage

Nine routes from one vessel. Tap a port to open its chart.

Why own Event Stub

Event Stub lets meetup hosts check people in by QR, gives each attendee a stub that remembers who they met, and nudges follow ups weeks later. On a ticketing platform, the platform owns your attendee list and the connections made in your room. Own it, and every check in, every stub and every 'who I met at your event' memory belongs to you as the host, deployed from your wallet.

What’s stopping you?

“Will attendees bother tapping phones?”

Some will, especially at builder meetups. Make it part of the welcome: 'tap three people before the talk'.

“Do attendees need crypto?”

The stub should work with a simple sign in; wallets can come later. Test the flow with someone non technical before the event.

“I can't code.”

Check in QR, stubs, tap to connect, reminders and analytics come built.

“What about privacy?”

Connections are only shared between the two people who tapped. Hosts see counts, not who met whom.

“Is it really mine?”

Yes. Deployed from your wallet on Base, Celo or Polygon.

The million-dollar ladder

Hosts pay per event or monthly; conference organisers and community brands pay for larger plans and sponsor analytics. This is a target, not a promise.

$60

$4,000

$30,000

$85,000

First 10 users

2 meetups

$30 per event

Regular hosts

80 hosts

$50 per month

Conferences

300 hosts plus 15 conferences