Birk Jernström (@birk) header
Birk Jernström (@birk) profile picture

Founder of @polar_sh - building the future of usage-based billing

Stockholm
Joined December 2007
Photo by Birk Jernström (@birk)Photo by Birk Jernström (@birk)Photo by Birk Jernström (@birk)Photo by Birk Jernström (@birk)Photo by Birk Jernström (@birk)Photo by Birk Jernström (@birk)Photo by Birk Jernström (@birk)Photo by Birk Jernström (@birk)Photo by Birk Jernström (@birk)Photo by Birk Jernström (@birk)
Birk Jernström retweeted
polar is the first PSP to support agentcard natively. anything sold on a polar checkout, your agent can now buy. you approve, it pays 😉
introducing agentic checkouts ✨ agents can now pay on any Polar checkout, with your approval, through @agentcardhq.
6
5
32
2,573
Birk Jernström retweeted
agentcard ❤️ @polar_sh we integrated with Polar so your agents can pay instantly on their checkouts. Polar is the first PSP to support @agentcardhq natively and this is just the beginning!!!
introducing agentic checkouts ✨ agents can now pay on any Polar checkout, with your approval, through @agentcardhq.
14
5
4
91
6,926
Birk Jernström retweeted
Every founder's favourite billing stack for AI software is just a prompt away. polar.sh/integrate
2
5
58
3,096
Birk Jernström retweeted
billing for agentic workflows ✨ we're building the most ambitious metering & billing engine for AI software. a technical deepdive → polar.sh/field-guide
4
13
7
268
18,527
Birk Jernström retweeted
Just witnessed an internal @polar_sh demo of our new usage metering engine. 3,750× faster than today. A 99.97% reduction in latency. Coming very soon.
2
6
22
2,035
Birk Jernström retweeted
Meet Polar. A billing & finance platform built for the usage era.
17
13
4
502
551,106
Birk Jernström retweeted
Usage Billing with Polar is a breeze ✨ Credits that draw down. Overages. Caps. All built in.
5
5
1
109
4,834
Birk Jernström retweeted
to put in simple terms… if most billing systems are still waiting for the kettle to boil, Polar’s metering already has the tea poured.
Getting there ⚒️
1
2
5
752
Birk Jernström retweeted
Working on a technical piece on how @polar_sh is building the fastest metering infrastructure for AI. What do you want to know?
Introducing: The next evolution of Polar ✨ We’re building the most ambitious metering & billing substrate for AI software. — Events as the core primitive. A blazing fast, local-first reducer architecture to achieve zero latency metering & entitlement resolution. — Your business as a definition, version controlled & native to agentic workflows. — Definition branching for simulating pricing changes, model forecasts & easy deployment to production. — Signals as business guardrails. Switch to a cheaper AI model when customer’s credits run below a threshold. — Identities as nested entities under the Customer model. Built for agents & services acting on behalf of the customer. Coming soon. Learn more → polar.sh/blog/building-the-n…
1
1
1
22
2,092
Replying to @birk
@birk and @polar_sh keep shipping gold at a truly phenomenal rate. Generational European Co in the making here.
Introducing: The next evolution of Polar ✨ We’re building the most ambitious metering & billing substrate for AI software. — Events as the core primitive. A blazing fast, local-first reducer architecture to achieve zero latency metering & entitlement resolution. — Your business as a definition, version controlled & native to agentic workflows. — Definition branching for simulating pricing changes, model forecasts & easy deployment to production. — Signals as business guardrails. Switch to a cheaper AI model when customer’s credits run below a threshold. — Identities as nested entities under the Customer model. Built for agents & services acting on behalf of the customer. Coming soon. Learn more → polar.sh/blog/building-the-n…
1
3
6
775
Birk Jernström retweeted
Polar will probably be the biggest player in the game when it comes to billing AI infra. I expect an exit via an acquisition by Stripe with billions within 4-5 years. Crazy that this team was 3 person op just 2 years ago, and CEO @birk responded every mail from his own mail lol.
Introducing: The next evolution of Polar ✨ We’re building the most ambitious metering & billing substrate for AI software. — Events as the core primitive. A blazing fast, local-first reducer architecture to achieve zero latency metering & entitlement resolution. — Your business as a definition, version controlled & native to agentic workflows. — Definition branching for simulating pricing changes, model forecasts & easy deployment to production. — Signals as business guardrails. Switch to a cheaper AI model when customer’s credits run below a threshold. — Identities as nested entities under the Customer model. Built for agents & services acting on behalf of the customer. Coming soon. Learn more → polar.sh/blog/building-the-n…
2
1
1
13
4,640
Birk Jernström retweeted
This is all I’ve ever wanted when building past companies! Kind of excited to build something new just so I can use Polar
Introducing: The next evolution of Polar ✨ We’re building the most ambitious metering & billing substrate for AI software. — Events as the core primitive. A blazing fast, local-first reducer architecture to achieve zero latency metering & entitlement resolution. — Your business as a definition, version controlled & native to agentic workflows. — Definition branching for simulating pricing changes, model forecasts & easy deployment to production. — Signals as business guardrails. Switch to a cheaper AI model when customer’s credits run below a threshold. — Identities as nested entities under the Customer model. Built for agents & services acting on behalf of the customer. Coming soon. Learn more → polar.sh/blog/building-the-n…
2
4
27
2,918
Birk Jernström retweeted
Speak to @birk, he’ll show you the future of billing for AI and it’s stunning!
Introducing: The next evolution of Polar ✨ We’re building the most ambitious metering & billing substrate for AI software. — Events as the core primitive. A blazing fast, local-first reducer architecture to achieve zero latency metering & entitlement resolution. — Your business as a definition, version controlled & native to agentic workflows. — Definition branching for simulating pricing changes, model forecasts & easy deployment to production. — Signals as business guardrails. Switch to a cheaper AI model when customer’s credits run below a threshold. — Identities as nested entities under the Customer model. Built for agents & services acting on behalf of the customer. Coming soon. Learn more → polar.sh/blog/building-the-n…
1
2
12
1,591
Birk Jernström retweeted
Migrate your entire Stripe catalogue, recurring subscriptions & customers to Polar ✨ Today, we're happy to announce our Private Beta of a new Platform Migration feature. Learn more → polar.sh/docs/migrate
4
9
3
78
13,454
Birk Jernström retweeted
I've been thinking about this problem a lot AI costs get higher and flat seat rates no longer make sense At the same time, metered billing is complex to set up, hard to track with so many providers/models/features, impossible to project, and charge accordingly. This is so cool
Introducing: The next evolution of Polar ✨ We’re building the most ambitious metering & billing substrate for AI software. — Events as the core primitive. A blazing fast, local-first reducer architecture to achieve zero latency metering & entitlement resolution. — Your business as a definition, version controlled & native to agentic workflows. — Definition branching for simulating pricing changes, model forecasts & easy deployment to production. — Signals as business guardrails. Switch to a cheaper AI model when customer’s credits run below a threshold. — Identities as nested entities under the Customer model. Built for agents & services acting on behalf of the customer. Coming soon. Learn more → polar.sh/blog/building-the-n…
1
2
12
735
Birk Jernström retweeted
24
14
11
369
30,499
Birk Jernström retweeted
Can’t make this up…the MacBook is using its webcam to look at its screen in a mirror to improve AMD Radeon chip support in Omarchy.
450
920
394
14,033
1,226,513
Birk Jernström retweeted
2/3 of today’s top stories are @polar_sh customers 🚀 Great customers trust a great payment platform 😉
1
16
563
Birk Jernström retweeted
We’re super excited to be partnering with @Accel, @Lovable and KTH AI Society for the AI Innovate Hackathon in Stockholm on September 16th. Apply for the hacakthon today → builderbase.com/event/accel-…
Calling Europe’s Future Founders! On 16 September, AI Innovate kicks off in Stockholm — the first stop in our new event series connecting the people shaping what comes next in AI. As part of the event, we’re hosting a hackathon with support from our partners @Lovable , @polar_sh and KTH AI Society. Applications are now open here: app.builderbase.com/event/ac… Bring your ideas. Build something ambitious. Meet fellow founders, builders and AI enthusiasts from across Europe. What are you waiting for?
2
3
15
5,690
Birk Jernström retweeted
3 → 17 employees in 1 year! ✨ This week, we're hanging out in Berlin & celebrating growing our fantastic team to 17 people, and planning out the next evolution of Polar. We have big plans in store for the next few months. We're hiring btw.
14
8
5
214
37,231