California, United States
Custom ERP and billing, AI agents, web applications and SaaS for technology and financial services businesses in San Francisco, CA. Built by Flip Retail in Jaipur, India, and delivered remotely, with working software every two weeks.
National tax, e-invoicing and data rules, with sources: United States guide. General information, not legal or tax advice. Last reviewed October 2026.
01 — Local economy
Venture capital and software set the pace: Salesforce, Uber, Airbnb and many AI labs and startups are headquartered in the city, with investors clustered around the Financial District and South of Market. Mission Bay adds biotech research around UCSF, while tourism, conventions at Moscone Center and a large restaurant trade remain major employers.
Also known as SF and San Fran.
English, Chinese and Spanish
02 — Industries
What we would build first for the industries San Francisco is known for.
03 — Local rules
On top of the national rules summarised above.
| California | Sales tax: 7.25% statewide base rate (including 1.25% mandatory local) plus local district taxesPrivacy: California Consumer Privacy Act as amended by the California Privacy Rights Act (CCPA effective 1 Jan 2020; CPRA amendments 1 Jan 2023; automated decision-making, risk-assessment and cybersecurity-audit regulations phasing in from 1 Jan 2026) |
|---|
General information, not legal or tax advice. Last reviewed October 2026. National tax, e-invoicing, data-protection and AI rules, with sources, are in our United States guide.
04 — Working together
Jaipur is 13 h 30 min ahead of San Francisco, CA on standard time, and 12 h 30 min ahead during daylight saving time there. A 09:00 start there is 22:30 in Jaipur. Office hours don't overlap, so we fix one call slot at the edge of the day and work asynchronously in between.
Local time, standard time.
Pranjal was excellent — fast, great at communicating, and completed the custom work.
50+ projects for 30+ clients in 11 countries over six-plus years.
05 — FAQ
Yes, remotely. Flip Retail is a software studio in Jaipur, India, with no office in San Francisco; discovery happens on video calls and you get working software every two weeks.
Jaipur is 13 h 30 min ahead of San Francisco, CA on standard time, and 12 h 30 min ahead during daylight saving time there. A 09:00 start there is 22:30 in Jaipur. Office hours don't overlap, so we fix one call slot at the edge of the day and work asynchronously in between.
Yes. Invoicing handles California sales tax (7.25% statewide base rate (including 1.25% mandatory local) plus local district taxes) and the other states where you have nexus. If you or your customers want it, a custom ERP can connect to DBNAlliance through an accredited provider.
Yes. Current language models handle English, Chinese and Spanish well, including mixed-language messages. We still test an agent in each language your customers use before it goes live, and route anything it is unsure about to your team.
Usually one module that fixes the most expensive problem first. For technology & startups that is often subscription billing and project & time tracking. It goes live early, and the rest of the system follows in two-week increments while your team is already using it.
Contact
Tell us about the process you want fixed. We reply within one working day.