Aelira vs PREP (Continual Engine): Which Document Remediation Platform?
Honest comparison of AI-powered document accessibility platforms.
Compare supported document fixes, human review and deployment fit.
Executive Summary
PREP (Continual Engine)
Best for: Organizations needing high-volume PDF and Office remediation with API access
- AI auto-tagging with human-in-the-loop review (claims ~95% accuracy)
- Remediates PDF, Word, PowerPoint, Excel, and EPUB
- Bulk processing + REST API
- On-prem / hybrid deployment options available
- No documented native LaTeX/MathML source remediation
- No published open-source self-hosted AI option
- Quote-based pricing (not publicly listed)
Pricing: Enterprise (contact sales)
Aelira
Evaluate for: Supported document fixes and connector workflows, with human review and deployment-specific testing
- Evaluate 8 documented file types against their format-specific limits and review requirements
- Canvas integration tested per maintainer; Blackboard experimental
- Self-hosted AI option; institutional privacy and contract review required
- Google and M365 connector code; deployment-specific acceptance checks required
- PDF source workflows apply supported partial fixes; saved output needs review
- Newer vendor (pilot program)
- SOC 2 certification has not been established
Pricing: $1,499/mo per department
Feature-by-Feature Comparison
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| Feature | PREP (Continual Engine) | Aelira |
|---|---|---|
| PDF Remediation Fix structural accessibility issues in uploaded PDF files | Yes Full (API + UI) | Yes Supported partial structural fixes; human review required |
| Word/PPT/Excel Scan and remediate Office document formats | Yes PDF, Word, PPT, Excel, EPUB | Yes Supported Word, PowerPoint and Excel partial fixes; review required |
| Native LaTeX/MathML Source Evaluate supported source fixes and MathML conversion with human review | Equation alt-text; no documented LaTeX/MathML source remediation | Yes Supported source fixes and MathML conversion; review required |
| LMS-Native Workflow Works inside Canvas, Blackboard, etc. | Not LMS-native | Yes Canvas integration tested per maintainer; Blackboard experimental |
| Cloud Storage Scan Connect to Google Drive, OneDrive, SharePoint | No | Yes Google and Microsoft connector code; acceptance checks required |
| API Access Programmatic document processing | Yes Auto-Tag, Checker, Audit APIs | Yes REST API + CLI |
| Self-Hosting and Provider Configuration Self-hosted AI option; verify egress, logs, caches, scratch, and backups | On-prem/hybrid offered; no open-source AI documented | Yes Self-hosted Ollama; verify providers, fallbacks, egress, logs, caches, and backups |
| PDF-to-HTML Convert PDFs to responsive accessible HTML output | Yes Responsive accessible output | No Supported partial source fixes; human review required |
| Video Captioning Auto-transcription and caption cleanup | No | Yes Transcription and cleanup candidates; human review required |
| Website Scanning Automated WCAG-aligned findings for review | Via Audit API | Yes Automated findings do not establish conformance |
| Pricing Cost to access the tool | Quote-based (not public) | $1,499/mo per dept |
What PREP (Continual Engine) Does Well
Document Remediation
AI auto-tagging across PDF, Word, PowerPoint, Excel, and EPUB with human-in-the-loop review and an exported, fixed file.
API-First
Programmatic document processing at scale with Auto-Tag, Checker, and Audit APIs.
PDF-to-HTML
Convert static PDFs into responsive, accessible HTML output.
Enterprise Scale
PREP (Continual Engine) publicly markets itself to large organizations and enterprises; see its own website for named customer references.
Where Aelira Differs
Native LaTeX/MathML Source
PREP offers equation alt-text, but does not document native LaTeX source or structural MathML remediation. Aelira supports partial LaTeX source fixes and conversion of supported equations to MathML. Review equation meaning and saved outputs on your corpus.
Self-Hosted Option and Provider Configuration
Aelira offers a self-hosted application with deployment-configured AI providers, including a local provider option. Validate provider settings, egress, logs, caches, scratch, and backups before making a data-residency claim.
LMS-Native Workflow
Aelira has a Canvas integration tested by the maintainer. Blackboard remains experimental. Validate permissions, scans, review, and publication before a faculty rollout.
Transparent Public Pricing
PREP is quote-based. Aelira publishes flat, public per-department pricing so you can budget without a sales call.
Evaluate LaTeX Workflows and Self-Hosted Deployment
Discuss a scoped pilot and evaluate format-specific fixes, saved output and deployment controls. Confirm the duration and terms in writing.
Join a bounded pilot to test supported workflows against your institution's obligations.
Comparisons are based on publicly available information as of August 2026 and reflect Aelira's views. Competitor features and pricing change over time; verify current details with each vendor. This page was authored by Aelira.