Quick winner
Summary badges based on structured data only — no invented claims.
OpenAI $20/mo vs Grammarly $12/mo
Both vendors offer a free plan
Both vendors publish an enterprise tier with SSO and admin controls
OpenAI exposes a public API
Similar breadth of plans and capabilities
Pricing comparison
How OpenAI and Grammarly price their plans side by side.
| Feature | OpenAI | Grammarly |
|---|---|---|
| Free plan | Yes | Yes |
| Entry monthly price | $20/mo | $12/mo |
| Entry annual price | $240/yr | $144/yr |
| Team / Business plan | $30/mo | $15/mo |
| Enterprise plan | Custom | Custom |
| Credits (entry paid tier) | Higher rate limits | Generative AI prompts |
| Public API | Yes | No |
| SSO / SAML | Yes | Yes |
| Admin Console | Yes | No |
| Priority / dedicated support | Yes | Yes |
| Billing model | Flat / month, Per seat / month, Custom | Flat / month, Per seat / month, Custom |
| Annual billing discount | — | — |
| Last pricing update | 2026-06-20 | 2026-06-20 |
Pricing history
Monthly price of the entry paid tier over time.
Feature comparison
Capability strengths derived from vendor category and published features.
Pros & cons
Derived from published plan structure and billing model.
- Free plan available — limited gpt-4o-mini
- Public API for developers and automation
- Enterprise tier with gpt-5 priority, sso / saml
- Category strengths: general ai, writing, reasoning
- Enterprise pricing requires a sales conversation
- Free plan available — basic suggestions
- Annual billing with discount available
- Enterprise tier with sso / scim, custom security
- Low entry price at $12/seat/mo
- Category strengths: writing, team workflows
- No public API — limited automation options
- Enterprise pricing requires a sales conversation
Best for
Recommendations based on structured capabilities.
Free tier plus low-cost entry paid plan
Public API and coding-oriented capabilities
Published enterprise plan with SSO and admin controls
Strong writing, image or productivity features
Annual billing plus predictable per-seat model
Pricing calculator
Estimate monthly and annual cost for your team.
Estimates based on published per-seat pricing. Enterprise plans require sales quotes.
Open Full Budget CalculatorFrequently asked
Answers drawn from the AIFinOps Vendor Database.
Grammarly has the lower entry price at $12/seat/mo. OpenAI starts at $20/seat/mo and Grammarly starts at $12/seat/mo.
Both OpenAI and Grammarly offer a free plan. OpenAI free: Limited GPT-4o-mini. Grammarly free: Basic suggestions.
OpenAI team option: Team at $30/seat/mo. Grammarly team option: Business at $15/seat/mo.
Both vendors publish an enterprise tier. Contact each vendor's sales team for a quote.
Yes. Both vendors offer month-to-month billing on their entry paid plans, so you can migrate without long-term lock-in. Import your team's spend into AIFinOps to model the switch before committing.
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