Sapling

The writing assistant for Google Docs is the same tool that runs in Outlook, Word and a browser extension, and it connects to 70 or more apps. Install it once and you get suggestions in most web editors and business apps. That breadth matters. People don't write in one place all day; they move between a help desk, an inbox and a document.

The detector estimates whether text was written by a machine, and it shows a score for the whole piece and for each sentence. Longer texts give better results; the tool gets noticeably more accurate past roughly 50 words. Sapling itself warns against using any detector, its own included, as a standalone verdict, since false positives and missed detections happen. Free checks cap at 2,000 characters, while Pro and Enterprise reach 100,000.

The edits endpoint and the in-app assistant correct grammar and spelling, and they catch punctuation slips. Each fix comes with an exact character offset. Offsets mean a program can apply the fix without guesswork, and a person can accept or skip it in the editor. A spelling-only endpoint covers cases where grammar changes aren't wanted.

Rephrasing reshapes a sentence while keeping its meaning, and simplify rewrites text to a chosen reading level. You can shift formality or tone too. This is the part that helps when a draft is technically correct but reads awkwardly, and it's available both in the app and through the API.

The API returns tone, sentiment, readability statistics, a writing-quality rubric and SEO metadata, all as structured JSON. Language detection and content-safety scoring round out the set. Each endpoint answers a narrow question well instead of bundling everything into one vague call.

Zero-shot classification sorts text into labels you define, with no training step. Extraction returns typed fields with the spans that support each value, named-entity recognition tags people and places, and PII detection returns the positions of personal data so it can be masked. These calls suit pipelines that need to route or clean text before it's stored.

The complete endpoint finishes sentences based on context, and Autocomplete Everywhere brings that into the editor. It's meant for repetitive writing where a phrase repeats across tickets or notes. The suggestions stay editable, so writers keep control instead of accepting a block of prewritten text.

Sapling runs on AWS with TLS in transit and AES-256 at rest, on isolated networks with default-deny access. It holds SOC 2 Type II and GDPR compliance, supports HIPAA and PCI needs, and undergoes annual penetration testing. Enterprise accounts add audit logs, role-based access control, single sign-on and self-hosting for teams that can't send text off-site.