About
We are building the honest way to answer a security review.
Attestloom started in Dallas in March 2023, after one of our founders counted the hours a security team spent answering the same questions in new spreadsheets. We think language models can do that reading, as long as every answer can be traced back to the evidence behind it.
Mission
Make every answer a vendor gives about its security fast to produce and easy to verify, so trust between companies is built on evidence instead of effort.
B2B software companies lose days to each 200 to 400 question review, and the answers drift from reality as policies change. We are an AI-native company: the product only exists because retrieval and language models can map a rephrased question to the right passage. We are equally serious about the guardrails that make that output safe to send.
Company facts
- Legal name
- Attestloom Inc.
- Entity
- Delaware C-Corp, US registered
- Headquarters
- Dallas, Texas
- Founded
- March 2023
- Team
- 9 people, full time
- Stage
- Pre-Seed, $850,000 raised
Leah Castellanos
Co-founder and CEO
Ran governance, risk, and compliance at a Dallas B2B payments company through two SOC 2 cycles and more than 600 customer security reviews. Started Attestloom after counting the hours.
Daniel Okafor
Co-founder and CTO
Built retrieval and document-understanding systems for enterprise search. Designs the citation pipeline so that no answer leaves Attestloom without a source passage behind it.
01
Evidence before eloquence
A short answer with a source beats a polished one without. The product is built so that it cannot be otherwise.
02
Say what we do not know
Gaps are a feature. A Needs owner row is Attestloom working correctly, not failing.
03
Earn the CISO, then the deal
We design for the person who signs the answer. Speed for sales follows from that, never the reverse.
Where we work
Dallas, Texas, full time.
Our team of 9 works from 1910 Pacific Avenue, Suite 1450, Dallas, TX 75201, with a few colleagues remote across the United States. Everyone at Attestloom works on it full time. We serve customers worldwide and price in US dollars.
(214) 555-0147 · hello@attestloom.com
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We are hiring for three roles across applied AI, full-stack engineering, and GRC solutions.