Rewriter AI vs Sapling

Rewriter AI combines a paraphraser, grammar checker and summarizer for written content. The paraphraser is described for emails, essays and social media posts; the grammar checker reviews English writing for grammar, spelling and punctuation; and the summarizer condenses articles, papers or documents to key points while retaining context. The site says the service supports over a hundred languages and allows 250 words to be rewritten for free. Free users can add up to two protected words and generate at most three articles; article generation is described as a trial feature on the free plan. Starter costs $6.40 a month, billed annually, and includes 50,000 words per month, web access and API access. Business costs $16.40 a month, billed annually, and includes 3,500,000 words per month, of which 700,000 are non-English, plus desktop and web versions, keyword analysis and API access. Paid Starter and Business plans include 50 image generations per month. The API uses HTTP GET and POST requests, returns JSON and supports browser CORS. The listed platforms include API, Linux, macOS, web and Windows.

Sapling combines writing assistance for teams with developer tools for adding language model-powered features to applications. Its writing tools include grammar and spelling corrections, autocomplete, rephrasing, tone and sentiment checks, and AI content detection. Style suggestions and tone detection are available, with support for 14 languages. Developers can access HTTP API endpoints and SDK components, including Python and JavaScript client libraries. Sapling lists 73 integration guides, with examples for Zendesk, Salesforce, Slack, Google Docs, Microsoft Word and browser extensions. It is available on the web, through extensions and Windows, via API, and in self-hosted deployments. Sapling says it uses TLS encryption in transit and AES-256 encryption at rest, and describes GDPR compliance and SOC 2 Type II certification. Enterprise accounts include audit logs, role-based access and single sign-on. The free plan has AI detector limits; paid writing assistance starts at $12/user/mo billed annually, and a 30-day trial is listed. API trials have a character limit and expire after one month.