Trevor here. I’m back with two interesting startups full of potential. I use both products every week. Here we go!

🇩🇪 Firefoo: The Powerful GUI Client for Google Firebase Firestore. (Founded 2021, Total Funding Amount: bootstrapped)

How it works

I use Firefoo at podmentions.co — I work with tons of transcripts and it allows me to edit with ease. I tried to make the original Firebase Web UI work, but it’s not good enough.

Slice and dice your data with multiple where conditions and order by clauses. Firefoo supports additional operators like starts-with and is-not-null.

Preview images stored in Firestore with Firefoo. The same goes for Geopoints. — You can also visualize the coordinates of your query results on an interactive map.

The Metrics

• ~50 paying users

• ~400 installs

The Team

Based in Germany, Berlin, co-founded by Mathis Lichtenberger and Moritz Lage.

Mathis is the VP of Engineering for a Berlin mobility startup. The startups’ backend is based on Firebase. He studied computer science and interned at Google and Facebook.

The backstory

Our mission is to empower app developers by taming powerful cutting-edge cloud technologies with delightful tooling.

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🇺🇸 Swapstack: Newsletter advertising marketplace. (Founded 2020, Total Funding Amount: bootstrapped)

How it works

In a nutshell, Swapstack connects brands to newsletter audiences for relevant sponsorships.

For newsletter writers: Swapstack does the heavy lifting to fill your sponsorship pipeline. So you can focus on writing and engaging your readers.

For brands: Drive efficient business results. Sponsor newsletters that speak to the perfect audience for your brand.

Swapstack is free for creators. They add a transaction fee for brands. — Writers invoice brands over the platform, Swapstack adds a platform fee to each invoice.

The Metrics

The Team

Based in Boston and Washington DC, co-founded by Jake Singer and Jacob Schonberger.

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🏁 You’re all set!

Startups Crushing It! is a newsletter about early-stage (before series A) technology startups.

I look for strong positive signals using the FPTM model: Founders — Product — Traction — Mission.

I interview the founder(s), toy around with products, crunch numbers, and based on that, I decide which startups to feature.

If you want more, you can dig through the archives for the previous digests.

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