Sonix is a strong general-purpose transcription service at $10 per audio hour pay-as-you-go (or $5/hour on a $25/month Core subscription), but it stops at transcripts — it has no evidence-review workflow, no citations into video moments, no redaction, and no case management. For criminal-defense teams reviewing discovery, Evidence Copilot is the alternative built for the job, starting at $39/user/month with 15 media-processing hours, timestamped diarized transcripts, OCR, an AI evidence agent with clickable citations, and frame-accurate redaction.
Bottom line: Sonix wins on raw per-hour transcription price and language breadth, but for legal evidence review the workflow matters more than the transcript: citations, redaction, OCR, sync, and audit trails are things Sonix simply doesn't offer.
TL;DR
- Sonix charges $10 per audio hour pay-as-you-go, prorated to the second; subscriptions drop the effective rate to $5/hr on Core ($25/mo, 5 hours), $2.50 on Advanced, and $2.00 on Pro.
- Evidence Copilot starts at $39/user/month (Solo, 15 media-processing hours included); Firm is $99/user/mo with 60 hours, and PD Office is $750/attorney/year with 100 hours — about 38% below JusticeText's ~$1,200/attorney/yr.
- Sonix's output is a transcript with an in-browser editor, translation into 54+ languages, subtitles, and AI summaries — useful, but generic.
- Evidence Copilot's AI evidence agent answers questions with citations that seek the exact second of video or page of the PDF; every output is marked AI-generated and pending human review.
- Sonix has no redaction, OCR, multi-camera sync, or exhibit exports; Evidence Copilot includes frame-accurate video/audio/image/PDF redaction with immutable originals and full audit trails.
- Sonix offers 30 free transcription minutes; Evidence Copilot offers a 7-day full-access trial (no card) and a 14-day money-back guarantee on every paid plan.
- Sonix is defense-agnostic — its own marketing targets law enforcement agencies; Evidence Copilot is defense-only by design.
Head-to-head
| Dimension | Sonix | Evidence Copilot |
|---|---|---|
| Pricing | $10/hr pay-as-you-go; Core $25/mo (5 hrs, $5/hr effective); Advanced $2.50/hr; Pro $2.00/hrwinner | Solo $39/user/mo (15 hrs); Firm $99/user/mo (60 hrs); PD Office $750/attorney/yr (100 hrs); overage hard-capped at 3x included hours |
| Transcription quality | 85–98% accuracy depending on audio quality; automatic speaker labels; browser editor | Deepgram Nova with speaker diarization and word-level timestamps; one-click speaker renaming propagates across every segment |
| Evidence workflow | None — transcripts, translation, subtitles, generic AI summaries | Cases, evidence inventory, timeline, tasks, auto-signals, cross-exam drafts, suppression playbooks, exhibit exportswinner |
| AI analysis | Summaries, topic detection, entity detection, sentiment analysis — not tied to citable moments | AI evidence agent answers questions with citations seeking the exact video second or PDF page; marked AI-generated and pending human reviewwinner |
| Redaction | Click-to-redact audio muting aimed at public-records workflows | Frame-accurate video, word-level audio, image and PDF redaction; originals immutable; every action audited; AI-suggested regions never auto-appliedwinner |
| Citations & verifiability | Timestamps on transcripts; no citation mechanism for AI output | Every AI answer carries citations into the exact source moment; exhibit pack includes a MANIFEST.md citation indexwinner |
| Collaboration | Multi-user plans with permissions, shared folders, version history (Advanced tier and up) | Case members and roles, per-member export permission, activity feed, two-way email intake |
| Integrations | Zapier, Dropbox, Google Drive, Adobe Premiere, NVivo, API | MCP server for Claude Desktop, ChatGPT, Claude Code, Cursor (read-only, org-scoped, no-token OAuth); email intake |
| Security posture | SOC 2 Type II, AES-256 at rest, TLS 1.2/1.3 in transit, HIPAA BAA, SSO/SAMLwinner | Immutable originals, audited actions, per-member export permission; no SOC 2 certification yet |
| Trial & guarantee | 30 free transcription minutes | 7-day full-access trial (Firm-level, no card); 14-day money-back guarantee on every paid planwinner |
Scores
Sonix
sonix.ai ↗Sonix is a general-purpose automated transcription, translation, and subtitling platform. It converts audio and video to text in minutes, with a browser-based editor that syncs playback to the transcript, automatic speaker labels, timestamps, and translation into 54+ languages on the same hours. The company claims 85–98% accuracy depending on audio quality (up to 99% in its own marketing) and says a 30-minute file processes in roughly 3–5 minutes. Sonix holds SOC 2 Type II certification, encrypts data with AES-256 at rest, and offers HIPAA compliance with a BAA. Its AI analysis tools include summaries, topic detection, entity detection, and sentiment analysis. It integrates with Zapier, Dropbox, Google Drive, Adobe Premiere, and research tools like NVivo, plus an API billed at standard rates. Notably, Sonix markets itself to law enforcement agencies for bodycam, 911, and interrogation transcription — the same evidence a defense team would be reviewing from the other side of the case.
| Plan | Price | What you get |
|---|---|---|
| Pay As You Go (Standard) | $10/audio hour | Single user, no subscription, prorated to the second |
| Core | $25/mo | 5 transcription hours/month, effective $5/hr; multi-user |
| Advanced | $2.5/audio hour (subscription) | Adds full-text search, speaker voiceprints, version history, user permissions, shared folders |
| Pro | $2/audio hour (subscription) | Adds webhooks, billing admin, per-user quotas, medical model, SOC 2 report access; up to 40 transcription hrs + 100 AI Workspace hrs/mo |
| Premium (subscription) | $22/mo per user | $22/user/mo platform fee + $5 per audio hour |
Pros
- Cheapest raw transcription of the two: $10/hour pay-as-you-go, dropping to $2.00/hour on Pro
- Fast turnaround — a 30-minute file processes in roughly 3–5 minutes
- Broad language support (53–54+ languages) with translation and subtitles included
- Strong security posture: SOC 2 Type II, AES-256, HIPAA BAA, SSO/SAML on enterprise tiers
- Mature integrations and API for automating transcription workflows
- 30 free minutes to evaluate with a real file
Cons
- Generic transcription product — no case structure, no evidence inventory, no timeline
- No clickable citations tying AI output to the exact video second or PDF page
- No redaction tools for discovery turnover (its click-to-redact audio muting is aimed at public-records workflows, not defense redaction with audit trails)
- No OCR for scanned police reports or photo evidence
- No multi-camera sync, no inconsistency detection between report and bodycam
- Markets to law enforcement agencies — not defense-specific by design
- AI analysis (summaries, themes) is not grounded in citable source moments
Evidence Copilot
evidencecopilot.com ↗Evidence Copilot is a grounded evidence-review workspace built specifically for US criminal-defense attorneys, law clerks, defense investigators, and public-defender offices. Upload the discovery dump — bodycam video, interrogation footage, jail calls, 911 audio, police report PDFs, photos, scanned documents (up to 2 GB per file, by web upload or email attachment) — and get timestamped diarized transcripts (Deepgram Nova with word-level timestamps), OCR'd document text, and an AI evidence agent that answers questions with clickable citations into the exact second of video or page of the PDF. Every new file is automatically compared against earlier evidence in the case, surfacing candidate inconsistencies (report vs bodycam, statement vs call audio) as review signals before anyone asks. It includes frame-accurate video redaction, word-level audio redaction, image and PDF redaction — every redaction is a new derived file and originals are never touched. Agent playbooks cover suppression motion prep, Miranda timelines, and exhibit list building, and cross-exam drafts generate suggested questions tied to quoted sources with no credibility conclusions. Every AI output is marked AI-generated and pending human review. A read-only, org-scoped, audited MCP server lets attorneys query cases from Claude Desktop, ChatGPT, Claude Code, or Cursor with a no-token OAuth connector flow.
| Plan | Price | What you get |
|---|---|---|
| Solo | $39/mo | Per user, 15 media-processing hours included; full workspace, no feature tiers |
| Firm | $99/mo | Per user, 60 media-processing hours included |
| PD Office | $750/yr per attorney | 100 media-processing hours included |
Pros
- Every AI answer cites the exact source moment — no uncited summaries to manually verify
- Built for the defense workflow: suppression prep, Miranda timelines, cross-exam drafts, exhibit exports with a MANIFEST.md citation index
- Auto-signals catch report-vs-bodycam inconsistencies on ingest, before anyone thinks to ask
- Full redaction suite with immutable originals and audit trails — built for discovery turnover
- Published pricing with no sales wall; overage hard-capped at 3x included hours so runaway intake cannot overbill
- PD Office tier at $750/attorney/yr undercuts JusticeText (~$1,200/attorney/yr) by roughly 38%
- 7-day full-access trial, no card; 14-day money-back guarantee on every paid plan
- MCP integration with a no-token OAuth flow — no defense-side competitor has one
Cons
- Higher entry price than raw transcription services: $39/user/mo vs Sonix's $10/hr pay-as-you-go for transcription alone
- Media-processing hours are metered (15 on Solo), so very high-volume offices need the Firm or PD tier
- Defense-only by design — no prosecution or law-enforcement use cases
- No SOC 2 or security certifications yet (honest current-posture language only)
- US criminal-defense focus means it's overkill for general business transcription needs like podcasts or marketing videos
Pricing compared: per-hour transcription vs per-seat workspace
The workflow gap: what happens after the transcript exists
Accuracy and audio reality: bodycam, jail calls, and 911 audio
Which should you pick?
FAQs
Is Sonix accurate enough for bodycam and jail-call audio?
Sonix states 85–98% accuracy depending on audio quality, and its law-enforcement content claims optimization for sirens, street noise, and overlapping speakers. On a large discovery dump, even 90% accuracy means substantial manual correction. Test with your own noisiest file during the 30 free minutes before committing.
Can I use Sonix transcripts as evidence in court?
Sonix provides editable transcripts with timestamps and speaker labels, but it offers no chain-of-custody features, no audit trail on the evidence itself, and no citation mechanism. If you need a defense workflow with immutable originals and audited actions, a transcription-only tool leaves you building that yourself.
How does Evidence Copilot's pricing compare for a small firm?
Solo is $39/user/month with 15 media-processing hours included; Firm is $99/user/month with 60 hours. Every plan includes the full workspace — there are no feature tiers — and overage is metered but hard-capped at 3x included hours so a runaway intake can't overbill. A 7-day full-access trial requires no card, and every paid plan carries a 14-day money-back guarantee.
Does either tool redact video and audio?
Evidence Copilot includes frame-accurate video redaction (drag a rectangle, black or blur), word-level audio redaction, and image and PDF redaction — every redaction is a new derived file, originals are never touched, and every action is audited. Sonix's click-to-redact audio muting is aimed at public-records workflows and does not constitute a defense redaction suite.
What if I already use Claude or ChatGPT in my practice?
Evidence Copilot ships a read-only MCP server you can connect from Claude Desktop, ChatGPT, Claude Code, or Cursor through a standard OAuth sign-in flow — no tokens to manage — letting you list cases, search evidence, and pull citations from your existing assistant. Sonix offers an API and Zapier integrations but no MCP or assistant-level connection.
Which is cheaper for 40 hours of bodycam footage?
For transcription alone, Sonix: $400 pay-as-you-go at $10/hour, or less on subscription. Evidence Copilot's included hours (15 on Solo, 60 on Firm) cover transcription plus OCR, redaction processing, and cited AI analysis — so the comparison depends on whether you're buying a transcript or a review workspace.
Sources
- Pricing: The most affordable speech-to-text platform | Sonix
- Compare Sonix Plans: Every Feature Side by Side (2026) | Sonix
- How Much Does Transcription Cost in 2026? Complete Pricing Guide | Sonix
- Otter.ai vs. Rev vs. Sonix: Pricing, Features, and How to Choose in 2026 | Sonix
- Sonix.ai vs Verbit: Best Transcription Software in 2026 | Sonix
- Best Court-Admissible Transcription Software For Law Enforcement | Sonix
- Customer Testimonials | Millions of Customers Love Sonix | Sonix
- AI Transcription Software: 99% Accuracy in 54+ Languages | Sonix
- Evidence Copilot — grounded evidence review for criminal-defense teams