Hummingbird vs Sphere
Which Compliance AI tool is better in 2026?
Hummingbird
The only AI-powered platform that delivers automation at every step of unified risk and compliance operations.
Sphere
AI-native global tax compliance engine for sales tax, VAT and GST
Side-by-side
Sphere is the more established option (raised $21M); pricing is comparable on both sides.
| Metric | Hummingbird | Sphere |
|---|---|---|
| Taglinei | The only AI-powered platform that delivers automation at every step of unified risk and compliance operations. | AI-native global tax compliance engine for sales tax, VAT and GST |
| Foundedi | — | 2023🏆 |
| HQi | — | San Francisco, US |
| Employeesi | — | 11-50🏆 |
| Neuron scorei | 15 | 70🏆 |
| Total fundingi | Undisclosed | $21M🏆 |
| Latest roundi | — | Series A · Nov 2025 |
| Valuationi | — | — |
| Cheapest paid plani | — | Pricing not disclosed |
| Free plani | ✗ | ✗ |
| Free triali | ✗ | ✓ |
| Top tier pricei | Enterprise · Contact sales | Pricing not disclosed |
| Pricing summaryi | 1 published plans | Free trial |
| Categoriesi |
Capability matrix
Developer-facing capabilities and access signals for Hummingbird and Sphere.
| Capability | Hummingbird | Sphere |
|---|---|---|
| MCP support | ✗ | ✗ |
| Public API | ✗ | ✓ |
| Webhooks | ✗ | ✗ |
| OAuth 2.0 | ✗ | ✗ |
| SDK languages | — | — |
| Free plan | ✗ | ✗ |
| Free trial | ✗ | ✓ |
| Verified | ✗ | ✗ |
| Active deal | ✗ | ✗ |
🟢 Strengths of Hummingbird
- Strong in AI Compliance
🔵 Strengths of Sphere
- Has raised more capital ($21M vs Undisclosed)
- Higher Neuron score (70 vs 15)
- Offers a free trial
- Newer company (2023)
Which should you choose?
Choose Sphere if price matters most — it starts at Free trial, 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 Sphere if you want the most established option — it has raised $21M, 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
Hummingbird vs Sphere — which is better?
It depends on your priority. Hummingbird is the leaner option; Sphere has broader feature depth. See the side-by-side table above.
Is Hummingbird cheaper than Sphere?
No — Sphere's cheapest paid plan is Free trial, while Hummingbird's is Enterprise · Contact sales.
Do Hummingbird and Sphere offer free plans?
Hummingbird: Paid only. Sphere: Free trial only.
Explore more AI Compliance tools
Contextual paths to related AI startups, deals and rankings.