Jonathan Fischner

Co-Founder & CEO, ChartDB · 1 appearance on the record.

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founderengineerexecutive@jonathanfishner ↗chartdb.io ↗

Fishner co-founded ChartDB, an open-source database diagramming tool that allows developers to visualize and model database schemas with a single query. He also founded OneCLI, a security and credential isolation gateway for AI agents, having previously worked as a software engineer at Fiverr.

10statements → 2claims → 1claims resolved → 3.9/5average certainty → 1.4/5average debate potential →

1 supported 0 partly supported 0 contradicted 1 not checkable as stated how the 2 claims stand · each chip opens the sources

2 assertions · 4 insights · 4 disclosures · every statement was checked. The predictions and assertions are the 2 claims: statements the public record can support or contradict. 1 is resolved, and 1 names no date, number or outcome precise enough to check. Everything else (opinions, insights, what ifs, disclosures) can never be settled by the record, so it carries no assessment.

The record, in short

What the tape says about how Jonathan argues and how the claims held up. Everything they said, and everything said about them, is in the tabs below.

Their most notable supported claim

Assertion Supported

ChartDB has surpassed 21,000 stars on GitHub

“So this is our GitHub chart to be chart to be, and we just passed 21,000 stars on GitHub.”

Jonathan Fischner Feb 25, 2026 ▶ 2:09 I Built a Niche App to $9K MRR

How they sound: not measured why? →

We measure speaking style by listening to the audio itself, and a fair number needs at least 2,000 words from one person on tape we have measured. There is too little of Jonathan Fischner on measured tape to publish a rate. This says nothing about how they speak.

What they said10 Episodes1

Everything Jonathan Fischner said on Starter Story that made the record, most notable first. Filter by type, assessment or year in the ledger →

Insight

Immediate visual value and zero-friction onboarding drove ChartDB's developer adoption

“The two things that I think made it work is, one, the product It's much more visual and easy to people to see the value right away, and it's giving like a better wow effect. And the second thing is reduction of the friction. So let's say you don't need to prov…”

Jonathan Fischner Feb 25, 2026 ▶ 3:28 I Built a Niche App to $9K MRR

Insight

Developers favor open source because it eliminates mandatory sign-ups

“Developers really appreciate open source because they can test it with no, like really sign up and things that they don't like.”

Jonathan Fischner Feb 25, 2026 ▶ 5:13 I Built a Niche App to $9K MRR

Insight

Monetization should directly respond to user behavior rather than guesswork

“Monetization should not be a guess and should be response to your behavior. And we watched our users and how people using CharDB over the time and based on their patterns and how they merge their patterns, we started like to understand how to take it from ther…”

Jonathan Fischner Feb 25, 2026 ▶ 8:39 I Built a Niche App to $9K MRR

Insight

ChartDB gained traction only after focusing exclusively on database visualization

“So I would tell myself like to pick one core value and defend it and like aggressively everything start working when we double down on once we focus entirely on making database visualization obvious and ignore everything else. Like that's what I would say, lik…”

Jonathan Fischner Feb 25, 2026 ▶ 12:15 I Built a Niche App to $9K MRR

Assertion Supported

ChartDB has surpassed 21,000 stars on GitHub

“So this is our GitHub chart to be chart to be, and we just passed 21,000 stars on GitHub.”

Jonathan Fischner Feb 25, 2026 ▶ 2:09 I Built a Niche App to $9K MRR

Disclosure

ChartDB surpassed 250,000 users and nearly $9,400 in monthly revenue

“We had the passing during the year two 50,000 developers that use the product in the revenue side, and we passed nine, almost 9400.”

Jonathan Fischner Feb 25, 2026 ▶ 2:14 I Built a Niche App to $9K MRR

Disclosure

ChartDB pivoted from an AI client due to developer trust issues

“In the beginning, Charlie B, we started, like with a different idea, and we thought about, like, trying, like, to build the database clients that incubate AI into them. So we started that direction, and we had, like, Big stop, because people don't really adopt…”

Jonathan Fischner Feb 25, 2026 ▶ 2:51 I Built a Niche App to $9K MRR

Assertion Not checkable as stated

ChartDB hit the Hacker News front page after three weeks of development

“The growth for ChartDB started with launch on Arker News. That got us, like, for the front page. So we started, like, developing RDB, and after three weeks of development, we decided to go for lunch, and we did some preparation, and then we decide, all right, …”

Jonathan Fischner Feb 25, 2026 ▶ 4:22 I Built a Niche App to $9K MRR

Disclosure

ChartDB is built using React, Vite, Node.js, and React Flow

“Yeah, so everything is React. We're using React Byte and Node.js, Tailwind, and React Flow for the canvas and all the entities.”

Jonathan Fischner Feb 25, 2026 ▶ 10:49 I Built a Niche App to $9K MRR

Disclosure

ChartDB spends $600 per month on AWS for cloud hosting

“AWS is where we have the cloud hosting, so costs 600 a month.”

Jonathan Fischner Feb 25, 2026 ▶ 11:27 I Built a Niche App to $9K MRR

Appearances (1)

Episode	Date	Speaking time
I Built a Niche App to $9K MRR	Feb 25, 2026	7m

Jonathan Fischner

The record, in short

Their most notable supported claim

How they sound: not measured why? →

Appearances (1)

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