There is no harm in disclosing this information after the fact. It's helpful feedback for the recruiter, and it builds rapport with them for the future, as you said. They may ask you WHY you chose a different company, though, and if you can say something constructive, that's also useful.\
\
In my experience, it's often about compensation. And that's OK to share as well. 

Author of Beyond Cracking the Coding Interview. Founder of interviewing.io

Aline Lerner

For over a decade, *Cracking the Coding Interview* has been hailed as the "bible" of interview prep. Now, its high-anticipated sequel, [Beyond Cracking the Coding Interview](https://www.amazon.com/dp/195570600X), is out. While the original delved deeply into coding problems, the sequel shifts its focus to teaching you how to think—both in the context of technical interviews and throughout the job search process.

In this event, the authors of [Beyond Cracking the Coding Interview](https://www.amazon.com/dp/195570600X) will share how tech hiring has changed in the last decade. Ask them anything about interview prep, job stuff, negotiation, or algorithms and data structures. The authors are:

- [Gayle Laakmann McDowell](https://www.gayle.com/), the original author of CtCI
- [Michael Mroczka](https://www.linkedin.com/in/mike-mroczka/), Google engineer and top interview coach on [interviewing.io](http://interviewing.io)
- [Aline Lerner](https://www.linkedin.com/in/alinelerner/), founder of [interviewing.io](http://interviewing.io)
- [Nil Mamano](https://www.linkedin.com/in/nilmamano/), Google engineer and algorithm researcher

Tech Lead/Manager at Meta, Pinterest, Kosei

Rahul Pandey

Tech Lead @ Robinhood, Meta, Course Hero

Alex Chiou

Primary author of Beyond Cracking the Coding Interview, Ex-Google

Michael Mroczka

CS PhD, Senior Software Engineer. Wrote 'Beyond Cracking the Coding Interview'

Nil Mamano

Author, Cracking the * Interview Series

Gayle Laakmann McDowell

Beyond 'Cracking the Coding Interview': 10+ Years Of Tech Interview Evolution

Founder