Grammarly vs Jasper
Both are writing tools. Here is what separates them.
What Grammarly is
Grammarly is a writing assistant that checks and rewrites text inside whatever you are already typing in. It ships browser extensions for Chrome, Safari, Firefox and Edge, desktop apps for Windows and Mac, integrations for Microsoft Office and Google Docs, and mobile apps for iPhone, iPad and Android. Authorship is the most unusual piece. It colour-codes sentences by their source, separating text that was typed, pasted from a website, taken from a Grammarly suggestion, or pasted from a non-web source, and it can replay how a document was written. It is opt-in, activated by a fingerprint icon, available without paying, and works in Google Docs, Microsoft Word, the Grammarly Editor, Superhuman Go and Canvas. The checking tools reach past grammar. The plagiarism checker compares text against more than 16 billion web pages plus academic papers held in ProQuest databases, drawing on sources including Wikipedia, Frontiers, PLOS One, ScienceDirect, SAGE Journals, PubMed, Elsevier, DOAJ, arXiv and Springer. It returns an originality score, highlights passages that need a citation and surfaces the matched source. A separate AI detector flags text produced by ChatGPT, Gemini, Claude and Microsoft Copilot. Grammarly puts its detection accuracy at 99 percent, while stating that no AI detector is 100 percent accurate and that human-written text can be flagged as a false positive. Named agents cover AI Grader, Citation Finder, Reader Reactions and Resume Builder. Plans separate mainly by AI prompt allowance. The Free plan carries no charge and includes 100 AI prompts a month. Plus adds full-sentence rewriting, tone adjustment, and detection of plagiarism and AI-generated text, and raises the allowance to 2,000 prompts per member per month, with one style guide, one brand tone and two user groups. Enterprise is quoted by the sales team, makes prompts unlimited per member, and removes the caps on style guides, brand tones and user groups. For organisations, the business feature set adds a style guide, brand tones, Knowledge Share, analytics, admin controls, SAML single sign-on, SCIM provisioning and centralised billing, with Enterprise layering on bring-your-own-key encryption, data loss prevention and an audit logs API. Training on customer data is switched off by default for business customers. The education product integrates with the Canvas, Blackboard and Moodle learning management systems, supports English, Spanish, French, German, Portuguese and Italian, and offers inline translation across 19 languages.
What Jasper is
Jasper is a marketing platform for producing copy and images at volume while keeping the output inside one brand's voice. The workspace is split into named surfaces: Canvas, Grid, AI Studio, Jasper Chat, Content Pipelines and Image Pipelines. A content pipeline moves through five stages called Plan, Create, Adapt, Activate and Optimize, so a piece is carried through reworking and distribution rather than stopping at a first draft. Both paid tiers include more than 100 pre-built marketing agents, among them named Optimization, Personalization, Research and Translation agents. Image generation is included on both plans alongside image editing and background removal, and Jasper supports more than 30 languages. Those named agents line up with the pipeline stages, so research, translation and optimisation happen next to the drafting rather than in separate tools. Pro costs $59 per seat per month billed yearly, or $69 billed monthly, and covers a single seat. Its ceilings are the thing to check before committing: 2 brand voices, 3 audiences and 5 multi-modal knowledge assets. That fits one company with a main brand and perhaps a second line. An agency holding several client brands, or a team that wants to load a large library of reference material, will run out of room quickly. Business is quoted rather than list priced and carries a 12 month minimum commitment. It removes the caps on brand voices, knowledge assets and audiences entirely, and it is the only tier that includes API access, SSO and SAML, the Style Guide feature, the no code builder for creating custom agents, and a dedicated account manager. That split is worth reading closely, because anything involving programmatic use, enterprise identity or a written style standard enforced across a team sits behind a sales conversation rather than a card payment. Outside the main application, Jasper ships a Chrome browser extension, public APIs including image APIs, and an MCP server, and advertises more than 1,000 integrations and extensions. The company states SOC 2 compliance and encrypted data protection. A 7 day free trial is available before either plan.
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