Rev vs Hello8: Which Platform for Professional Subtitles?
Rev is a trusted name in English transcription. Hello8 was built for multilingual video localization. Here's how they compare when subtitle quality is the goal.
What is Rev?
Rev is a U.S.-based transcription and captioning service trusted by over 750,000 customers. It is known for highly accurate English transcription powered by professional freelancers, a mobile recording app, and compliance-ready services for legal, academic, and enterprise clients. Rev supports HIPAA and SOC 2 Type II compliance.
What is Hello8?
Hello8 is a subtitling and video localization platform built around its AI Reviewer. It transcribes and translates in 90+ languages and checks reading speed, timing and typography on every subtitle. The AI Reviewer reads each one for grammar, translation and glossary mistakes and leaves comments you accept or dismiss.
At a Glance
A high-level overview before we get into the details.
Feature-by-Feature Comparison
A side-by-side look at what each platform offers for professional subtitle and transcription workflows.
AI that fixes your subtitles. Not just transcribes them.
Rev focuses on getting the transcription right. Hello8 goes further: AI watches your video, reads your subtitles, and tells you exactly what to fix with one-click corrections.
No AI Review (Rev)
Rev does not offer an AI subtitle review tool. After transcription, you edit manually or export as-is.
- No automated review of subtitle quality, timing, or style
- Editing is manual: you review the transcript and make corrections yourself
- No inline comments, no suggested fixes, no one-click corrections
Active AI (Hello8)
The AI reviews your entire subtitle file proactively. It posts comments directly on problematic subtitles, each with the exact issue and a proposed fix.
- AI scans your subtitle file and posts comments on each problematic subtitle
- Each comment pinpoints the exact issue (e.g. "Incorrect comma separating the subject from its verb") with a proposed solution
- Click "Apply" to fix instantly, or click any comment to jump to that subtitle in the editor
How Hello8's AI Reviewer works
Problem detected
AI scans your video and subtitles for timing, accuracy, and style issues
AI analyzes
Full context review using audio, video, and subtitle tracks together
Suggestion ready
A specific fix is proposed with a clear explanation
One-click apply
Accept the fix instantly. No copy-pasting or manual edits
Security & Compliance
Both platforms take security seriously, but they serve different compliance needs.
Hello8: GDPR & Encryption
Hello8 is built with European data protection standards at its core.
- GDPR-compliant with encryption at rest and in transit and secure file handling
- Data removal controls so your content stays yours
- Enterprise-grade security with dedicated project management for large volumes
Rev: HIPAA & SOC 2
Rev is built for U.S. compliance frameworks, especially in regulated industries.
- SOC 2 Type II compliance for enterprise clients
- HIPAA-compliant transcription available on request
- FCC, ADA, and WCAG compliance for captions
Why Teams Choose Hello8
Hello8 was purpose-built for professional subtitling and localization, not adapted from a general transcription tool.
AI + Optional Human Review
AI handles transcription and translation. Add human review when you need it — expert linguists refine accuracy, tone, and cultural context.
Subtitle-First Engineering
Hello8's editor is built around reading speed, timing precision, and typographic quality. CPS and CPL validation happen automatically.
Language-Specific QA
French guillemets, English curly quotes, German capitalization rules. Hello8 validates against the typographic standards of each target language.
90+ Languages, One Workflow
Transcription, translation, and subtitling all in one platform. No jumping between tools for different steps.
Enterprise-Grade Security
Encryption at rest and in transit, secure file handling, and data removal controls. Your content stays yours.
Dedicated Project Support
For large-scale projects, get a dedicated project manager, custom style guides, and SLA guarantees. Not just a self-serve platform.
Hello8 Is the Right Choice If You Need…
Rev excels at English transcription for legal and compliance use cases. But if your subtitles will be seen by a multilingual audience, Hello8 is built for that standard.
Broadcast-ready subtitles that meet CPS and timing standards
Professional localization for documentaries, corporate videos, or marketing content
A single platform that handles transcription, translation, and subtitling
Consistent quality across 90+ languages with language-specific validation
An AI Reviewer that catches conjugation, grammar, and translation issues like a human would
Enterprise security and dedicated project management for large volumes
Frequently Asked Questions
Is Rev cheaper than Hello8?
Rev offers competitive pricing for English transcription. Hello8 targets high accuracy across 90+ languages with its AI Reviewer catching grammar, conjugation, and translation issues automatically. Optional human review is available when you need it. For multilingual projects where re-work costs more than getting it right the first time, Hello8 delivers better value.
Does Rev offer subtitle QA like Hello8?
No. Rev focuses on transcription accuracy but does not include subtitle-specific QA tools. Hello8 validates reading speed (CPS), characters per line (CPL), and language-specific typographic rules on every subtitle file.
Can Rev handle multilingual projects?
Rev recently added translation from English into 17 languages. Hello8 supports 90+ languages for transcription, translation, and subtitling, with language-specific QA rules built into every workflow.
Is Rev HIPAA-compliant?
Yes. Rev offers HIPAA-compliant transcription on request, which makes it a strong choice for healthcare and legal clients. Hello8 focuses on GDPR compliance and enterprise-grade encryption.
How does Hello8's human review work?
AI generates the initial transcription and translation. Hello8's AI Reviewer then checks for conjugation, grammar, translation, and hesitation issues, leaving comments you can approve in one click. For projects that need it, you can add human review as an option — expert linguists refine accuracy, tone, and cultural context.
More Comparisons
Further reading
Best Professional Subtitling Services in 2026
An honest comparison of 6 subtitling services for different use cases. From enterprise studios to independent filmmakers, here's how to choose.
Read articleAI Subtitle Review: How It Works and Why It Matters
Manual subtitle review takes 3-4x the video duration. Learn how AI review catches grammar, conjugation, and translation errors with one-click fixes.
Read articleUsing ChatGPT to review your subtitles. The trap.
ChatGPT, Claude, and Gemini can't check timing, reading speed, or translation accuracy. Here's what AI chatbots actually miss when you paste subtitles into a chat window.
Read article
Ready to See the Difference?
Book a call with our team and see how Hello8 delivers subtitles you don't have to fix.