Digraph.dev VS VoyaLang

VoyaLang's answer:

VoyaLang is built only for IELTS Writing, so every part of the feedback follows the four official criteria instead of general writing advice.

• Each Task 1 visual type is handled on its own terms: line graphs, bar charts, pie charts, tables, process diagrams, maps, and mixed charts.
• General Training letters are checked by type and register, not treated like essays.
• Scores stay consistent, so the same essay does not get a different band each time it is submitted.
• The rewrite is at the student's own target band, so they can see exactly what that band looks like in their own words.
• Teachers can grade on top of it for free: each essay arrives already scored, and the grade a teacher gives becomes the student's grade.

VoyaLang's answer:

• It covers the whole exam: IELTS Academic and IELTS General Training, Task 1 and Task 2, including charts, maps, process diagrams, and letters.
• The feedback is something you can act on: a band for each criterion, every correction explained, and your answer rewritten at your target band.
• Scores stay consistent, so progress over weeks of practice means something.
• It is free: a free account grades up to 10 essays, with no card and no paid plan.
• It respects your data: built and hosted in Germany, GDPR-compliant, and you can export or delete everything yourself.

VoyaLang's answer:

• IELTS candidates preparing for university admission, work, migration, or professional registration, who need honest feedback on their writing before test day.
• IELTS teachers and tutors who run writing classes and want every essay already scored and corrected before they give the final grade.

VoyaLang's answer:

I took IELTS myself to study in Germany. I could practise reading and listening on my own and find someone to talk to for speaking, but writing was the one section I could not practise alone, because nobody could mark it. Human marking costs money and takes days, and generic AI tools gave a different score every time.

So I built VoyaLang: IELTS Writing feedback that follows the official criteria, stays consistent, and comes back in under a minute. Today it also includes a free panel for teachers who want the first read done before they grade.

• Maryam Mohebi, founder

VoyaLang's answer:

• Backend: Python, FastAPI, PostgreSQL
• Frontend: Next.js, React, TypeScript, Tailwind CSS
• AI: large language models
• Infrastructure: Docker, hosted in Germany, with Sentry for error tracking

VoyaLang's answer:

• Individual IELTS test-takers preparing on their own. VoyaLang does not have any company or school customers to name yet.