Starspace · Private beta

Private spaces, and a companion who does the work.

Starspace, with Star inside. In your browser, by voice or text.

Request access

or write to hello@mainstar.ai

01Star

Star is the companion. Give her the work.

Space A · LifeStar

01You ask
You
Move Thursday’s dentist to next week and tell Ana.
02She remembers
Star
You told me Ana prefers mornings, so I looked at mornings next week.
03She does it
Moved it to Tuesday at 09:00, and told Ana.
04She shows what changed
What changed−Thu 15:30 Dentist+Tue 09:00 Dentist, next week

Fig. 2. An illustration of one exchange, not a screenshot.

02Starspace

Fig. 3. An illustration of a space, not a screenshot.Point at a room

03Promise

04Company

“Products designed to evolve with you, and to be with you for life.”

Serban Mogos, Founder, Mainstar Inc.

Mainstar Inc. is a Delaware company based in San Francisco that builds Starspace and Star.

Contact

Request access

or write to hello@mainstar.ai

Effective 12 October 2026

Mainstar Inc., a Delaware corporation
2261 Market Street STE 64609
San Francisco, CA 94114, US
hello@mainstar.ai

Mainstar Inc. sells Starspace, with Star, as a software subscription. You pay by card through Stripe; it renews each billing period until you cancel.

Cancel at any time by email to hello@mainstar.ai. You keep access until the end of the paid period, and it does not renew.

Ask within 14 days of a charge and we refund that charge in full. Write to hello@mainstar.ai.

If a charge looks wrong, contact us first at hello@mainstar.ai. We will resolve it with you directly.

Your data is never sold, and is shared only with the providers that run Star. Ask us any time to export or delete it. Privacy policy

Between you and Mainstar Inc., which operates mainstar.ai. What you create stays yours. Terms of service