# Jonathan Heiliger (slim)

> Jonathan Heiliger's investments in AI tools on Anchor Terminal, Diffbot Technologies Corp. and Optimizely, with each listing's grade and the founders behind it.

- Full: https://www.anchorterminal.com/investors/jonathan-heiliger/index.md (~550 tokens) · this version ~430 tokens · JSON https://www.anchorterminal.com/investors/jonathan-heiliger/index.json · canonical https://www.anchorterminal.com/investors/jonathan-heiliger/
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · MCP: https://www.anchorterminal.com/mcp · Updated: 2026-10-28
- Licence: CC BY 4.0, credit Anchor Terminal and link this page (https://www.anchorterminal.com/terms/#data)

Angel investor.

## Companies on Anchor Terminal

- **Diffbot Technologies Corp.**, Angel round, May 2012
  - [Diffbot](https://www.anchorterminal.com/tools/diffbot.md), graded C, 54.3/100
  - Source: https://techcrunch.com/2012/05/31/diffbot-raises-2-million-seed-round-for-web-content-extraction-technology/
- **Optimizely**, Seed, November 2010
  - [Optimizely Experimentation](https://www.anchorterminal.com/tools/optimizely.md), graded B, 62.6/100
  - Source: https://techcrunch.com/2010/11/16/optimizely-ab-tests-its-way-to-1-2-million-in-funding-from-a-roster-of-top-angels/

## Where they invest

- Web scraping & crawling, 1
- Product analytics & experimentation, 1

## Founders they backed

- [Mike Tung](https://www.anchorterminal.com/people/mike-tung/), Diffbot Technologies Corp.
- [Pete Koomen](https://www.anchorterminal.com/people/pete-koomen/), Optimizely

## Questions

### Which AI tools has Jonathan Heiliger invested in?

Anchor Terminal lists Diffbot Technologies Corp.

### How are Jonathan Heiliger's companies graded?

On Anchor Terminal's benchmark, Diffbot (C, 54.3) and Optimizely Experimentation (B, 62.6).

Investors are named from the companies' own announcements, the investors' own pages, Y Combinator's company pages, public filings and news reports of a round, each with its source.