Fermentation that follows your day.
Stop waiting for your sourdough starter — start scheduling it.
SourFriend finishes fermentation right on your schedule.
Be among the first to try it through our beta testing program.
First Round Closed!
The first round of tester recruitment is now closed. A heartfelt thank you to the 10 bakers who joined our early experiment. But don't worry — more chances are coming. Sign up to be notified when Round 2 opens.
Why does sourdough always steal my time?
Every time you bake sourdough, do you find yourself waking up at dawn or struggling to adjust your day around fermentation?
Everyone's rhythm is different — but fermentation has always followed its own clock.
That's why we asked: Why should we wait for fermentation, instead of fermentation waiting for us?
What is SourFriend?
SourFriend is a smart fermentation device that adapts to your schedule — not the other way around. Built for bakers who want to take control of their day, SourFriend makes sourdough work with your lifestyle.
MVP Features
for the Best Sourdough Starter
Scheduled Fermentation
Set the end time, and SourFriend takes care of the rest.
Cold Storage Mode
Automatically switches to refrigeration mode after fermentation — keeps your starter fresh for up to 21 days.
App Sync & Condition Analysis
Track fermentation history, monitor starter health, and get personalized routine recommendations.
✔️ Here's how it works:
Set alarm
Set the desired fermentation completion time (alarm style)
Feed when convenient
Feed your starter whenever it's convenient for you
Peak on time
SourFriend automatically completes fermentation on time
Store up to 21 days
Keeps your starter fresh for up to 21 days with built-in cold storage
SourFriend Beta Prototype — Shaped by Your Hands
SourFriend is currently in its final pre-production phase.
To refine it further, we've crafted a small batch of beta devices using high-precision 3D printing.
But this isn't just a product demo.
At Toasterz, we believe:
Real problems come from real users. And so do the best solutions.
We don't want to build this product alone at our desks.
We want to build it together — with bakers like you, in real kitchens, through real routines.
This beta test isn't just for feedback.
It's your chance to shape the final piece of SourFriend with your insight.
By joining:
You'll be among the first to experience the product, and your feedback will directly influence development.
Be a co-creator.
Be the beginning of SourFriend.
Beta Test Participation Guide
We are looking for :
- ✓Home bakers who have experience managing a sourdough starter
- ✓Those who've struggled with fermentation timing in their daily schedule
- ✓Users willing to provide thoughtful feedback
Perks:
- ⭐Early access and exclusive discount on the final product
- 🏆Chance to receive a free final product based on your contribution level
What You'll Receive
Beta Device
A 3D-printed beta version of SourFriend
(free or with refundable deposit)
Beta App Access
Access to our beta mobile app
Feedback Surveys
Two rounds of feedback surveys
❓FAQ
Q: When does Round 2 of beta testing begin?
A: The exact date isn't set yet, but we'll notify all signups first.
Q: When will the final product launch?
A: We're aiming to launch by the end of 2025 after thorough testing and iteration.
Q: Is the test product different from the final one?
A: Yes — the beta focuses on core functionality. The final version will feature refined materials and design.
Take the first step to changing your baking routine.
Because fermentation should be science you can schedule — not guesswork you suffer through.