Grammarly vs Upstage AI
Which Agents AI tool is better in 2026?
Grammarly
AI writing assistant for individuals and teams.
Upstage AI
Building intelligence for the future of work with high-performance AI solutions.
Side-by-side
Grammarly leads on both fronts — more capital raised ($1.2B) and a lower entry price than Upstage AI.
| Metric | Grammarly | Upstage AI |
|---|---|---|
| Taglinei | AI writing assistant for individuals and teams. | Building intelligence for the future of work with high-performance AI solutions. |
| Foundedi | 2009🏆 | — |
| HQi | San Francisco, US | KR |
| Employeesi | 1001-5000🏆 | — |
| Neuron scorei | 84🏆 | 68 |
| Total fundingi | $1.2B🏆 | $72M |
| Latest roundi | Growth · May 2025 | Series B · Apr 2024 |
| Valuationi | $13B🏆 | — |
| Cheapest paid plani | Pro (Annual) · $12/mo🏆 | Pricing not disclosed |
| Free plani | ✓ Free | ✗ |
| Free triali | ✓ | ✗ |
| Top tier pricei | Pro (Monthly) · $30/mo | Pricing not disclosed |
| Pricing summaryi | 6 published plans | Enterprise · Contact sales |
| Categoriesi |
Capability matrix
Developer-facing capabilities and access signals for Grammarly and Upstage AI.
| Capability | Grammarly | Upstage AI |
|---|---|---|
| MCP support | ✗ | ✗ |
| Public API | ✓ | ✗ |
| Webhooks | ✗ | ✗ |
| OAuth 2.0 | ✓ | ✗ |
| SDK languages | 1 (JavaScript) | — |
| Free plan | ✓ | ✗ |
| Free trial | ✓ | ✗ |
| Verified | ✗ | ✗ |
| Active deal | ✓ | ✗ |
🟢 Strengths of Grammarly
- Has raised more capital ($1.2B vs $72M)
- Higher Neuron score (84 vs 68)
- Offers a free plan
- Offers a free trial
🔵 Strengths of Upstage AI
- Strong in AI Agents
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
Grammarly vs Upstage AI — which is better?
It depends on your priority. Grammarly has raised more capital and is the more established option; Upstage AI has broader feature depth. See the side-by-side table above.
Is Grammarly cheaper than Upstage AI?
Yes — Grammarly's cheapest paid plan is Pro (Annual) · $12/mo, while Upstage AI's is Enterprise · Contact sales.
Do Grammarly and Upstage AI offer free plans?
Grammarly: Yes, has a free plan. Upstage AI: Paid only.
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