Firstbase vs Sphere
Which Compliance AI tool is better in 2026?
Firstbase
Incorporation, compliance, and bookkeeping for global founders
Sphere
AI-native global tax compliance engine for sales tax, VAT and GST
Side-by-side
Firstbase leads on both fronts — more capital raised ($65M) and a lower entry price than Sphere.
| Metric | Firstbase | Sphere |
|---|---|---|
| Taglinei | Incorporation, compliance, and bookkeeping for global founders | AI-native global tax compliance engine for sales tax, VAT and GST |
| Foundedi | 2019🏆 | 2023 |
| HQi | New York City, United States | San Francisco, US |
| Employeesi | — | 11-50🏆 |
| Neuron scorei | 72🏆 | 70 |
| Total fundingi | $65M🏆 | $21M |
| Latest roundi | Series B · Mar 2022 | Series A · Nov 2025 |
| Valuationi | — | — |
| Cheapest paid plani | From $399/mo🏆 | Pricing not disclosed |
| Free plani | ✗ | ✗ |
| Free triali | ✗ | ✓ |
| Top tier pricei | Pricing not disclosed | Pricing not disclosed |
| Pricing summaryi | Subscription + one-time · From $399/mo | Free trial |
| Categoriesi |
Capability matrix
Developer-facing capabilities and access signals for Firstbase and Sphere.
| Capability | Firstbase | Sphere |
|---|---|---|
| MCP support | ✗ | ✗ |
| Public API | ✗ | ✓ |
| Webhooks | ✗ | ✗ |
| OAuth 2.0 | ✗ | ✗ |
| SDK languages | — | — |
| Free plan | ✗ | ✗ |
| Free trial | ✗ | ✓ |
| Verified | ✗ | ✗ |
| Active deal | ✗ | ✗ |
🟢 Strengths of Firstbase
- Has raised more capital ($65M vs $21M)
- Higher Neuron score (72 vs 70)
- Lower starting price ($399/mo)
- More mature (2019)
🔵 Strengths of Sphere
- Offers a free trial
- Newer company (2023)
Which should you choose?
Choose Firstbase if price matters most — it starts at Subscription + one-time · From $399/mo, which is friendlier for teams watching burn. Both AI Compliance tools ship core features, so the cost delta often decides it for small teams and solo operators.
Choose Firstbase if you want the most established option — it has raised $65M, suggesting more runway for enterprise features, support, and long-term roadmap. For mission-critical workflows or larger teams, that stability often outweighs a lower monthly price.
Frequently asked questions
Firstbase vs Sphere — which is better?
It depends on your priority. Firstbase has raised more capital and is the more established option; Sphere has broader feature depth. See the side-by-side table above.
Is Firstbase cheaper than Sphere?
Yes — Firstbase's cheapest paid plan is Subscription + one-time · From $399/mo, while Sphere's is Free trial.
Do Firstbase and Sphere offer free plans?
Firstbase: Paid only. Sphere: Free trial only.
Explore more AI Compliance tools
Contextual paths to related AI startups, deals and rankings.