Builders Clubin Mantle Chat

Events and topics

What we talk about

Calls on what early-stage founders need right now. Members choose the next topics together, inside the community.

Coming up

On the calendar

Regular meetups every week, and sessions with guest experts. Come to the ones you like, as often as you like, or pick your topics and we'll let you know when something on them is coming up.

Thu3 3 Dec · 18:30–19:30 CETIntroduction callWe tell you about the community and get to know each other: everyone gets three minutes to say who they are and what they build. FreeJoin

Regular meetups · what the community gives you

Everyweek From December · Online · 30 minutesPitch practice 1:1Pair up with another founder, pitch for five minutes each and swap honest feedback. FreeJoin
Everyweek From December · Online · 20 minutes1:1 intro callWe introduce you to one founder you should meet, based on what you build and what you need. A short call to see how you can help each other. FreeJoin
Every2 weeks From December · Online · 1 hourAsk for helpBring one problem you're stuck on. Whoever joins helps you think it through. FreeJoin
Everymonth From December · Online · 1 hourMember talks: share what you're great atEvery founder is an expert in something. Two members give a 15-minute talk on what they know best, from a launch to a sales trick, then questions. Want to give one? Say so when you join, and we help you prepare. FreeJoin
Everymonth From February · OnlinePitch NightFounders pitch for three minutes each and take questions from a guest jury of experts and founders. Then everyone votes. Want to pitch? Say so when you join. FreeJoin

A meetup goes ahead when at least two members sign up. We find a time that suits you.

Sessions with guest experts

Datesoon Online · date in the community soonWho is it for? Live positioningOne hour, live. We pick one startup at random from those who join and help it with positioning: who it's really for and how to say it in one sentence. Date soonJoin
Datesoon Online · date in the community soonPitch to the group: three startups, live feedbackOne hour, with a guest expert. Three founders pitch for five minutes each, then the expert and everyone else give feedback. Want to pitch? Say so when you join. If more than three do, we pick at random. Date soonJoin
Datesoon Online · date in the community soonWBSO: R&D tax credit with an expertFor startups in the NetherlandsHow startups in the Netherlands get R&D tax credit from the first year, explained by someone who files them every week. Bring your questions. Date soonJoin
Datesoon Online · date in the community soonVibe coding with an expertBuild a first version with AI tools, live, with someone who does it every day. What works, and where it still breaks. Date soonJoin
Datesoon Online · date in the community soonInsurance for startupsWhich insurance a young company needs, what it costs, and what can wait. With an expert who insures startups. Date soonJoin
Datesoon Online · date in the community soonSelling B2B: how founders closed their first dealsWho to contact first, how the first calls go and how long it really takes a company to say yes. With a founder who sells to businesses. Bring your questions. Date soonJoin
Datesoon Online · date in the community soonHow to build a pitch deckWhat goes on each slide, and what investors skip. A hands-on session with a partner team. Date soonJoin
Datesoon Online · date in the community soonAI search: getting found in ChatGPT and GoogleHow startups show up when people ask ChatGPT, Perplexity or Google's AI, and what you can do about it this month. With an expert. Date soonJoin
Datesoon Online · date in the community soonPitch deck teardown with an expertWe take one founder's pitch deck and go through it slide by slide with an expert: what works, what to cut and what investors will ask. Want yours picked? Say so when you join. Date soonJoin
Datesoon Online · date in the community soonYour first 50 B2B leads, liveBring a description of your ideal customer. We find matching companies and the right person in each, live, from websites, job posts and registries. One or two startups picked at random go from a description to a ready list. Date soonJoin
Datesoon Online · date in the community soonWhich investors to pitchHow to build a list of funds and angels that fit your stage, sector and country, instead of writing to everyone. From a VC who became a founder. Date soonJoin
Datesoon Online · date in the community soonCold email teardownSend in a cold email you use or plan to send. We take a few apart live and rewrite them, based on what we can learn about the company you're writing to. Date soonJoin

The exact topic of each expert session is set later, together with the expert. Dates come with it.

Most calls run in Mantle Chat, big ones on Zoom. The link is in the community.

Formats

Members choose what runs next

Examples of formats we can run. When you join, you pick the ones you like. The most wanted go on the calendar, and every week you get a short pick of the ones that match your topics. Say yes to the ones that suit you. Got another idea? Suggest it inside the community.

Your table

A small table of founders at your stage, matched by what you need.

Pitch swap

Pair up and practise your pitch on each other.

Pitch Night

Founders from different countries pitch to a guest jury of experts. Everyone votes.

Build together

Cameras on, an hour of quiet work, then say how it went.

Ask for help

Bring one problem. Whoever joins helps you think it through.

Customer interview practice

Practise in pairs: one plays the customer, then you swap.

Win of the week

Share one win from your week, big or small.

Demo night

Show what you built in three minutes, live.

What went wrong

One story that didn't work out, told plainly. No slides.

Networking call

Share links to your projects and your social profiles, and swap them with other founders.

Launch room

For everyone launching this month: the plan and who shows up for you.

Admin help

Company, VAT, bookkeeping and visas, answered by people who've done it.