Duckbill vs Grammarly
Which Agents AI tool is better in 2026?
Duckbill
An AI-plus-human executive assistant that actually completes your personal to-do list
Grammarly
AI writing assistant for individuals and teams.
Side-by-side
Grammarly leads on both fronts — more capital raised ($1.2B) and a lower entry price than Duckbill.
| Metric | Duckbill | Grammarly |
|---|---|---|
| Taglinei | An AI-plus-human executive assistant that actually completes your personal to-do list | AI writing assistant for individuals and teams. |
| Foundedi | 2022 | 2009🏆 |
| HQi | Boston, United States | San Francisco, US |
| Employeesi | — | 1001-5000🏆 |
| Neuron scorei | 71🏆 | 68 |
| Total fundingi | $33M | $1.2B🏆 |
| Latest roundi | Series A · Sep 2023 | Growth · May 2025 |
| Valuationi | — | $13B🏆 |
| Cheapest paid plani | Pricing not disclosed | Pro (Annual) · $12/mo🏆 |
| Free plani | ✗ | ✓ Free |
| Free triali | ✓ | ✓ |
| Top tier pricei | Pricing not disclosed | Pro (Monthly) · $30/mo |
| Pricing summaryi | Free trial | 6 published plans |
| Categoriesi |
Capability matrix
Developer-facing capabilities and access signals for Duckbill and Grammarly.
| Capability | Duckbill | Grammarly |
|---|---|---|
| MCP support | ✗ | ✗ |
| Public API | ✗ | ✓ |
| Webhooks | ✗ | ✗ |
| OAuth 2.0 | ✗ | ✓ |
| SDK languages | — | 1 (JavaScript) |
| Free plan | ✗ | ✓ |
| Free trial | ✓ | ✓ |
| Verified | ✗ | ✗ |
| Active deal | ✗ | ✓ |
🟢 Strengths of Duckbill
- Higher Neuron score (71 vs 68)
- Newer company (2022)
🔵 Strengths of Grammarly
- Has raised more capital ($1.2B vs $33M)
- Offers a free plan
- Lower starting price ($12/mo)
- More mature (2009)
Which should you choose?
Choose Grammarly if price matters most — it starts at Free · From $12/mo, which is friendlier for teams watching burn. Both AI Agents tools ship core features, so the cost delta often decides it for small teams and solo operators.
Choose Grammarly if you want the most established option — it has raised $1.2B, 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.
💸 Deals
7-day free trial of Grammarly Premium
Try Grammarly Premium free for 7 days — AI writing assistant used by 30M+ daily.
Frequently asked questions
Duckbill vs Grammarly — which is better?
It depends on your priority. Duckbill is the leaner option; Grammarly is cheaper to start. See the side-by-side table above.
Is Duckbill cheaper than Grammarly?
No — Grammarly's cheapest paid plan is Pro (Annual) · $12/mo, while Duckbill's is Free trial.
Do Duckbill and Grammarly offer free plans?
Duckbill: Free trial only. Grammarly: Yes, has a free plan.
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