Every new California business filing, every dayGuidebook
Guidebook is an event technology platform that provides native mobile event apps, registration, badges, and event websites. The company is headquartered at 584 Castro St in San Francisco, California, which matches the LLC filing address. Their website offers contact information and describes their attendee experience platform.
Filed March 12, 2026 · San Francisco, CA · San Francisco County
Find new event technology platform businesses in San Francisco, then launch a cold email campaign built for you.
Every new California filing, every day
See how it worksSource
California Secretary of State (bizfile Online) · Entity 20261305159 · Retrieved June 13, 2026
About Guidebook
Guidebook inc. was incorporated in California on March 12, 2026, and its principal address is in San Francisco. The company's domain was registered nearly 29 years before the filing, on July 5, 1997, and its website is a modern, verified match to the filing name and address. No annual report or EIN on file yet. We estimate its annual revenue is between $10 million and $50 million and it employs 26 to 100 people, operating entirely online.
- Domain registered 10,477 days before the filing date, indicating a long-established web presence.
- Filed in California with a San Francisco principal address.
- Website identity confirmed to match the company name and address.
- We estimate revenue of $10M-$50M and 26-100 employees, all online.
- No annual report or EIN on file yet.
- First seen by DayOneLead 93 days after filing.
Compiled from the state record, the company's public web presence, and our own research; revenue, employee, and footprint figures are estimates, not verified financials. Updated August 23, 2026.
One of 421 new businesses registered in San Francisco in March 2026, and the only event technology platform business registered there that month.
Is this business yours?
It's getting views. Claim the page for free to control what your customers see.
Filing Details
Verified Business Profile
Contact Information
Verified Website Profile
We matched this business to its website and pulled the domain's registration (WHOIS) record. Domain age is one of the strongest signals that a filing is a truly new business and not a re-filing or paperwork change.
Frequently Asked Questions
When was Guidebook registered?
Guidebook was registered as Corp on March 12, 2026 in California.
Where is Guidebook located?
Guidebook is based in San Francisco, CA, 94114, in San Francisco County.
What type of business is Guidebook?
Guidebook is classified as a event technology platform business (mobile event apps).
Does Guidebook have an EIN on file?
No EIN was found on file for Guidebook at the time of registration.
Who Sells to This Business
Based on the business category, these service providers typically target this type of business.
Turn fresh event technology platform businesses into your next customers
We find newly registered businesses, verify their contact details, and build the campaign. You review everything before anything sends.
Build My Campaign Free ›