AI Tool Comparison
Compare two AI tools side by side
Choose two listings and compare free-plan details, best-use cases, setup friction, verification notes, and official source links on one page.
Quick verdict
Grammarly vs SEMrush ContentShake
Best free-plan signal: Test both. Use this as a starting point only. Pricing, limits, privacy, commercial-use rights, and data-use policies can change, so verify official sources before relying on either tool.
| Decision point | Grammarly | SEMrush ContentShake |
|---|---|---|
| Primary category | AI Writing & Content | AI Writing & Content |
| Pricing signal | Freemium | Freemium |
| Free-plan score | 7.0/10 | 7.0/10 |
| Best use case | Writing and copywriting platform | SEO and marketing tool |
| Free-plan limits | 100 per month for Free users (Pro: 2,000; Enterprise: unlimited) | Free Trial: A 7-day free trial is available, providing full access to all ContentShake features without restrictions for the trial period. This appears to be the primary "free" access method for full-feature evaluation.Permanent Free "Demo": There is also a permanent free "Demo" version, but with limited functionality. Information on its specific limits is not consistently listed across official sources, but it is intended for basic feature exploration before upgrading |
| Signup friction | Verify signup requirements | Verify signup requirements |
| Open-source/local fit | Not clearly open source / verify | Not clearly open source / verify |
| Browser-based access | Browser-based signal found | Browser-based signal found |
| API availability | API signal found | Verify API availability |
| Commercial-use note | ✅ Yes, permitted under specific agreements. The Grammarly Customer Business Agreement governs use by organizations for internal business purposes. It is the controlling agreement for any organization using Grammarly Business, Grammarly for Education, or Grammarly for any commercial/business purpose. | Allowed with paid plan. The free trial is for evaluation only. Commercial use of generated content is permitted under the terms of the paid subscription plan. You must review the official Terms of Service for the specific paid plan you choose. |
| Last checked | 2026-05-06 | 2026-05-06 |
| Verification source | Open source | Open source |
Primary category
Grammarly
AI Writing & Content
SEMrush ContentShake
AI Writing & Content
Pricing signal
Grammarly
Freemium
SEMrush ContentShake
Freemium
Free-plan score
Grammarly
7.0/10
SEMrush ContentShake
7.0/10
Best use case
Grammarly
Writing and copywriting platform
SEMrush ContentShake
SEO and marketing tool
Free-plan limits
Grammarly
100 per month for Free users (Pro: 2,000; Enterprise: unlimited)
SEMrush ContentShake
Free Trial: A 7-day free trial is available, providing full access to all ContentShake features without restrictions for the trial period. This appears to be the primary "free" access method for full-feature evaluation.Permanent Free "Demo": There is also a permanent free "Demo" version, but with limited functionality. Information on its specific limits is not consistently listed across official sources, but it is intended for basic feature exploration before upgrading
Signup friction
Grammarly
Verify signup requirements
SEMrush ContentShake
Verify signup requirements
Open-source/local fit
Grammarly
Not clearly open source / verify
SEMrush ContentShake
Not clearly open source / verify
Browser-based access
Grammarly
Browser-based signal found
SEMrush ContentShake
Browser-based signal found
API availability
Grammarly
API signal found
SEMrush ContentShake
Verify API availability
Commercial-use note
Grammarly
✅ Yes, permitted under specific agreements. The Grammarly Customer Business Agreement governs use by organizations for internal business purposes. It is the controlling agreement for any organization using Grammarly Business, Grammarly for Education, or Grammarly for any commercial/business purpose.
SEMrush ContentShake
Allowed with paid plan. The free trial is for evaluation only. Commercial use of generated content is permitted under the terms of the paid subscription plan. You must review the official Terms of Service for the specific paid plan you choose.
Last checked
Grammarly
2026-05-06
SEMrush ContentShake
2026-05-06
Verification source
Grammarly
https://www.grammarly.com/
SEMrush ContentShake
https://www.semrush.com/contentshake/