Fosti
The facts below are what the maker publishes about Fosti, checked and dated. Our editors have not written about it yet.
Plans and prices
From Fosti's own pricing page, checked 10 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Starter | $399 a month | Up to 5 active clients · up to 3 team members · all 11 core modules · white-label portal · email support · $399/mo; $4,300/yr · save 10% |
| Growth | $799 a month | Up to 15 active clients · unlimited team members · custom subdomain & branding · priority support · $799/mo; $8,600/yr · save 10% |
| Scale | $1,499 a month | Up to 35 active clients · advanced analytics · dedicated onboarding · 99.9% uptime SLA · $1,499/mo; $16,200/yr · save 10% |
| Enterprise | Priced on request | 35+ active clients · SSO & SCIM · custom integrations · white-glove onboarding · volume discounts available · Custom |
The facts
Each one read from Fosti's own pages, with the date it was checked.
What it does
- API access
- Yeschecked 22 Sep 2026
- Client portal
- The white-label client portal lets clients upload data, approve liabilities, and track filing status, and is included in all tiers.checked 10 Oct 2026
- Data residency
- The site says all data is stored in U.S. regions and backups are daily.checked 10 Oct 2026
- Filing support level
- assistedchecked 22 Sep 2026
- Integrations
- The site lists Vertex, Avalara, OneSource, Sovos, TaxJar, NetSuite, QuickBooks, and Xero; it says import files are generated for Vertex, Avalara, and OneSource.checked 10 Oct 2026
- Limits
- All tiers include unlimited states and the white-label portal, and the site says there are no per-return fees.checked 10 Oct 2026
- Modules
- The product lists 11 modules, including CRM and nexus profiles, filing calendar, escrow ledger, document management, time and billing, and exemption certificates.checked 10 Oct 2026
- Paid from
- 399checked 22 Sep 2026
- Purpose
- Fosti is an operating system for sales tax practices, designed for multi-client, multi-state compliance at CPA firms.checked 10 Oct 2026
- Return filing
- Nochecked 22 Sep 2026
- Returns engine
- The site says Fosti’s native returns engine is planned for Q4 2026, with PDF generation for the top 15 states.checked 10 Oct 2026
- Security
- Fosti states it is SOC 2 Type II audited and uses AES-256 encryption at rest, TLS 1.3 in transit, and per-tenant isolation.checked 10 Oct 2026
- Support and onboarding
- Starter includes email support, Growth includes priority support, and Scale includes dedicated onboarding; self-serve onboarding is stated to take under an hour.checked 10 Oct 2026
- Supported tax types
- sales taxchecked 22 Sep 2026
- Upgrade notice
- Fosti says it notifies customers when they reach 90% of their client limit, and upgrades are one click, prorated, and effective immediately.checked 10 Oct 2026
- Workflow
- Its compliance workflow uses a five-step cycle that opens automatically for each active client, with sequential steps and logged actions.checked 10 Oct 2026
- Worksheets
- Fosti says its worksheets auto-populate from client data and flag material variances for senior review.checked 10 Oct 2026
Money
- Free plan
- Nochecked 22 Sep 2026
