Writable vs Quill

Writable, owned by Houghton Mifflin Harcourt, and Quill.org, a nonprofit, aim at the same shelf but from opposite ends. Writable is a full revision workflow. Quill is a targeted grammar and sentence structure drill engine.

Feedback quality

Writable produces trait scored rubric feedback aligned to state standards. Quill produces sentence level correction feedback with immediate reteach.

What we would buy

Writable for teachers who assign multi draft writing. Quill for classrooms that need targeted skill remediation. Both, if the budget supports it, since they solve different problems.