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Custom Legal Software Development & AI Solution for Depositions

Enhance accuracy, speed, and compliance in your legal operations with AI-powered deposition and transcription software. Plavno delivers custom legal software development for law firms, court reporting agencies, and enterprises — integrating Legal AI to automate workflows, streamline transcript certification, and reduce administrative workload by up to 50%.

Let’s Build Your Solution
70–90%

Faster Transcript Turnaround

AI transcription and automated QA reduce delivery time from 2–3 days to under 12 hours, providing next-day certified transcripts even for multi-speaker depositions.

Automated ASR & diarization
Real-time capture & tagging
Streamlined legal QA process
40–60%

Reduction in Manual Review Time

AI-powered RAG validation and contextual QA ensure consistent terminology, citation accuracy, and jurisdictional language — cutting manual editing and quality review by half.

RAG-based error detection
Auto-correction for legal terms
Context-driven consistency
35–50%

Lower Administrative Overhead

Centralized scheduling, smart document routing, and auto-export to DMS/eDiscovery systems eliminate repetitive coordination and filing tasks.

AI-based scheduling & matter linking
Smart metadata routing
Auto-sync with client repositories
90–100%

Evidentiary Chain Accuracy

Immutable, hash-chained custody logs and cryptographically signed exports ensure legal defensibility and full audit compliance — exceeding manual record reliability.

Verifiable chain-of-custody
Digital signature validation
Role-based access and traceability

Plug-and-play Solutions

AI-Driven Voice & Workflow Automation for Certified Transcripts

Plavno’s Legal AI platform supports deposition management, transcription accuracy, and cross-platform collaboration. Using voice recognition and RAG-based automation, our systems ensure certified transcripts are delivered the next day with full auditability and HIPAA/GDPR-ready data handling.

  • Multi-channel audio/video capture

  • Exhibit tagging and metadata linking

  • Guided triage and self-service routing

  • RAG-powered legal knowledge base

RAG
E-discovery
Self-service routing
<span>AI-Driven Voice & Workflow Automation</span> for Certified Transcripts
01

Overview — AI-Powered Legal Software for Remote & Hybrid Depositions

Our secure custom legal software development platform enables remote, hybrid, and in-person depositions powered by advanced Legal AI. We combine multi-participant audio and video streaming, real-time speaker diarization, and AI-driven legal transcription to deliver authenticated, certified exports (PDF/TXT) within hours — fully compliant with U.S. evidentiary standards.



  • Faster turnaround with next-day certified transcripts

  • Lower costs per proceeding while maintaining integrity and compliance

  • Unified workspace for audio capture, exhibit management, transcript QA, and delivery

  • Complete audit trail & chain-of-custody from session start to export

Overview — AI-Powered Legal Software for Remote & Hybrid Depositions
02

Problem & Challenge —Why Legal AI Matters

Traditional remote depositions rely on fragmented video tools, manual note-taking, and human transcription — leading to rework, delays, and audit gaps.
Legal AI solutions eliminate these inefficiencies, ensuring reliability, transparency, and compliance throughout the deposition process.



  • Multi-channel capture across networks ensures complete context

  • ASR + diarization models tuned specifically for legal speech and crosstalk

  • Real-time exhibit tagging and retrieval during testimony

  • Provable chain of custody and authenticated exports that hold up

Problem & Challenge —Why Legal AI Matters

AI-driven development

Solution — AI-Powered Legal Tech
Solution for Depositions & Certified Transcripts

Through our deep legal software development expertise, Plavno integrates advanced Legal AI models for speech recognition, evidence labeling, transcript generation, and compliance auditing — creating a truly intelligent and secure deposition ecosystem for law firms, court reporters, and legal service providers. Our custom legal software development ensures high accuracy, scalability, and compliance for every deposition workflow.

Product Highlights

    • Multi-Channel Capture: Record counsel, witnesses, interpreters, and reporters simultaneously with optional dual-track audio.

    • Live Rough + Captions: Generate real-time transcripts using legal-tuned ASR and AI-driven speaker diarization.

    • Exhibit Workflow Automation: Upload, tag, and link exhibits with QR codes, watermarks, and full chain logging.

    • Legal RAG Engine: Context-aware glossary and rule-based corrections for citations, local rules, and case-specific terminology.

    • Authenticated Exports: Produce certified PDF/TXT outputs with audio alignment, signatures, and automated delivery receipts.

    • Role-Based Access Controls: Assign custom permissions (counsel, witness, reporter, observer) with secure watermarked roles.

    • Audit & Custody Tracking: Immutable, tamper-evident logs and hash-chained audit artifacts for every legal record.

User Flows

    • Schedule & Invite → create matter → add participants / roles → calendar + secure links

    • Proceeding → join → multi-channel capture → live rough + captions → exhibit tagging

    • QA & Certification → scopist / reporter review → apply glossary & RAG checks → certify

    • Delivery → authenticated PDF / TXT, aligned audio / video → repository export (Relativity, DMS)

    • Archive → immutable logs, retention, legal hold

Experience & Scale

    • Sub-second captions where network allows; graceful fallbacks on poor links

    • Handles crosstalk, over-talking, and accented speech

    • Built for multi-hour sessions with recovery from brief disconnects

Architecture Overview

Deep Dive: Project Architecture

    • Clients: Browser app (React) for counsel/witness/reporter; observer mode

    • RTC / Media: WebRTC SFU; per-speaker tracks where supported; RTMP ingest (Zoom / Teams / Webex)

    • Speech: Streaming ASR (legal-tuned) + diarization; forced alignment to master audio post-session

    • Text & Exhibits: Real-time rough; exhibit tagging/stamps; QR / linking; versioned references

    • RAG: Glossaries, prior matters, jurisdiction-specific phrasing; retrieval-grounded normalization

    • Custody: Hash-chained event log (join / leave, exhibits, edits); signed artifacts; retention & legal holds

    • Delivery & Integrations: Authenticated PDF / TXT with delivery receipts; connectors to DMS/eDiscovery (iManage, NetDocuments, Relativity), S3 / Box / OneDrive

    • Observability: QoS metrics, WER dashboards, audit log viewer

Deep Dive: Project Architecture

Challenges

Hard Problems We Solved with Legal AI & Custom Legal Software Development

Clarity under crosstalk

Clarity under crosstalk

Our AI-powered diarization and alignment models distinguish overlapping speakers, interruptions, and noise — ensuring legal transcripts remain clear and verifiable even under complex multi-participant conditions.

Identity you can trust

Identity you can trust

With role-based watermarking and labeled speakers, our system authenticates every voice and ensures full traceability throughout the deposition workflow — delivering the highest level of transcript integrity and security.

Exhibits without chaos

Exhibits without chaos

AI-driven in-flow tagging and OCR-based linking keep exhibits organized, searchable, and custody-stamped in real time. No more lost evidence or mismatched documents — everything is stored and traceable through a unified legal database.

Custody that stands up

Custody that stands up

All exports are cryptographically signed and hash-chained to create an immutable chain-of-custody. Our legal tech AI maintains verified timestamps, audit logs, and compliance certifications — ensuring your digital evidence stands up in every jurisdiction.

Value

Quality & Fidelity 

Horizontal scaling with consistent performance

Legal-tuned streaming ASR

Legal-tuned streaming ASR

With speaker diarization; auto-punctuation / capitalization

Streaming ASR
MVP
RAG

RAG

Over prior matters & jurisdictional style guides

RAG terms
MVP
WAV / FLAC masters

WAV / FLAC masters

Loudness normalization, echo / noise controls

Multichannel WAV / FLACt
MVP
WER / DER dashboards

WER / DER dashboards

Confidence heatmaps

Real Time Analytics
MVP
Hash-chained event logs

Hash-chained event logs

Artifact hashing

SHA-256
MVP
Scopist → reporter

Scopist → reporter

Review with redline history

Two-pass QA
MVP

Benchmarks

Scale & Reliability

Robust Infrastructure for Peak Performance and Low-Latency Consistency

Horizontal scaling

Horizontal scaling

Elastic scaling of RTC / ASR / diarization nodes

Per-tenant isolation

Per-tenant isolation

Isolated rooms & rate limits for predictable QoS

Multi-AZ deployment

Multi-AZ deployment

Observer fan-out for larger audiences when needed

Self-healing

Self-healing

Failover with health checks and circuit breakers

Data Protection

Security & Compliance

Robust security with role-based access control (RBAC) and JWT authentication

End-to-end TLS

End-to-end TLS

WAF; rate limiting

RBAC + SSO / SAML

RBAC + SSO / SAML

Per-matter access controls; watermarking

SOC 2 processes

SOC 2 processes

GDPR / CCPA aligned; region-pinned data residency options

Chain-of-custody

Chain-of-custody

Signed artifacts, hash-chained logs, export attestations

Encryption at rest

Encryption at rest

KMS-managed keys; audit logs & admin approvals

Under the Hood

Architecture Overview

Clients & Conferencing

Clients & Conferencing

  • Browser app (React) for counsel / witness / reporter; observer mode;
  • WebRTC A/V; RTMP ingest support for 3rd-party bridges (Zoom / Teams / Webex)
Media & Speech

Media & Speech

  • SFU for multi-party capture; per-speaker tracks where supported;
  • Streaming ASR (legal-tuned) with diarization & forced alignment;
  • Timestamped rough → alignment to master audio after session
Storage & Custody

Storage & Custody

  • Immutable, hash-chained event logs (join / leave, exhibit actions, edits);
  • Object storage for A/V and artifacts; retention & legal holds
Exhibits & Text

Exhibits & Text

  • Real-time exhibit tagging / stamping; QR / linking; versioned references;
  • RAG index of glossaries, prior matters, and jurisdictional rules;
  • Scopist / editor workspace; certification workflow
Delivery & Integrations

Delivery & Integrations

  • Authenticated exports (PDF / TXT) with signature and delivery receipts;
  • Connectors to DMS / eDiscovery (iManage / NetDocuments / Relativity), S3 / Box / OneDrive
Observability

Observability

Per-session QoS metrics; WER dashboards; audit log viewer

Delivery Crew

Project Team

High-performing developers for growing companies

Renata Sarvary

Renata Sarvary

Sales Manager

Ready to Transform Your Legal Workflow with AI?

Get certified, next-day transcripts powered by Legal AI and custom legal software development. Whether you’re a law firm, court reporting agency, or legal services provider — Plavno’s AI-driven deposition automation delivers accuracy, speed, and compliance at scale.

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Key Performance Flow — How Our Legal AI Solution Works

Our custom legal software development framework delivers a fully automated deposition pipeline that connects every stage — from secure session setup to certified transcript delivery.
 Powered by legal tech AI, the system intelligently manages authentication, real-time speech capture, evidence labeling, and compliance verification.

01

Join & Verify

Secure lobby → role assignment (counsel / witness / reporter / observer) → device checks → watermarking & access controls

02

Capture & Live Rough

Multi-channel A/V capture via WebRTC / SFU → speaker diarization + time-codes → live rough captions in-session

03

Exhibits & Legal RAG

Upload / stamp exhibits, QR / link and reference in testimony → glossary & jurisdiction normalization via RAG to reduce QA passes

04

QA, Certify & Deliver

Scopist / reporter review → certify transcript → generate authenticated PDF / TXT aligned to audio → export to DMS / eDiscovery → archive with tamper-evident chain of custody

Clinical Intelligence Stack

Clinical Intelligence Stack

    • Streaming ASR (optional), medical NLU, slot-filling for symptoms/signs

    • RAG over your protocols / SOPs / payer rules with cited snippets

    • Guardrailed LLM responses (jurisdictional disclaimers, no unsupported claims)

    • Red-flag triggers and urgency scoring

Delivery & Automation

Delivery & Automation

    • Instant or scheduled appointments with reminders

    • Handover to nurse line or on-call clinician with audit trail

    • Optional storage of transcripts / notes with configurable retention

    • Admin console to manage dialogs, rules, and service lines

Throughput & Scale

Throughput & Scale

    • High-concurrency triage sessions across sites

    • Sub-second conversational feel for chat / voice paths

    • Horizontal scale of NLU / RAG / decisioning; per-tenant QoS and isolation

Integrations

step 1
step 2
step 3
step 4

Conferencing

Zoom, Teams, Webex (via RTMP / SDKs)

Repositories

iManage, NetDocuments, SharePoint / OneDrive, Box, S3

eDiscovery

Relativity, Reveal (exports)

Identity

Okta, Azure AD (SSO / SAML)

Results

Plavno’s legal AI solutions deliver measurable improvements in deposition management, transcript accuracy, and operational efficiency. By combining custom legal software development with domain-trained AI and automation, we help law firms and reporting agencies cut costs, accelerate turnaround, and strengthen evidentiary compliance.

↓ Turnaround

↓ Turnaround

Deliver next-day certified transcripts with automated QA, glossary-driven corrections, and real-time ASR integration — accelerating every deposition from session to submission.

↓ Rework by 30–40%

↓ Rework by 30–40%

Reduce manual editing and quality assurance time through RAG-based normalization that ensures consistent legal terminology, citations, and jurisdictional formatting before certification.

↑ Retrieval speed

↑ Retrieval speed

Access exhibits, transcripts, and quotes instantly with time-coded, searchable repositories, improving review efficiency and client response times.

↑ Evidentiary readiness

↑ Evidentiary readiness

Maintain full legal defensibility with tamper-evident custody logs, digital watermarks, and cryptographically signed exports — ensuring compliance with chain-of-custody and data-integrity standards.

↑ Cost efficiency

↑ Cost efficiency

Lower operational overhead by automating manual transcript review, exhibit tagging, and delivery.
 Our legal tech AI reallocates resources efficiently, helping firms scale without adding administrative headcount

Tools We Used

Technology stack

Media/RTC & Telephony

Media/RTC & Telephony

WebRTC SFU
Optional SIP / RTMP gateways
WAV / FLAC masters
TURN / STUN
Speech & Language

Speech & Language

Streaming ASR (Conformer-Transducer class)
Diarization
Forced alignment
RAG
Backend & Orchestration

Backend & Orchestration

Node / NestJS
PostgreSQL
Redis
Object Storage (S3)
Queues / Workers
Frontend

Frontend

React
Redux Toolkit / React Query
WebSocket signaling
Ant Design
Ops

Ops

AWS EKS / EC2
IaC (Terraform)
Observability (metrics / logs / traces)
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Frequently Asked Questions

Quick Answers

Find answers to your common concerns

Is the rough text admissible?

The rough transcript is for reference only. The certified transcript, produced and authenticated by our Legal AI workflow, serves as the official legal record — compliant with U.S. court and evidentiary standards.

How do you prove chain of custody?

Every deposition event is hash-chained and digitally signed, with cryptographically authenticated exports and immutable delivery logs. Plavno’s legal tech AI solution automatically preserves timestamps, authorship, and transfer integrity to meet chain-of-custody compliance requirements.

Can we bring our own video platform?

Yes. Our custom legal software supports WebRTC, RTMP, and integrations with Zoom, Microsoft Teams, and Webex. All exhibits, logs, and recordings remain synchronized and securely stored in a single, auditable workspace.

How do you handle confidential exhibits?

Sensitive materials are handled through role-based access control, watermarking, and sealed-record workflows. Our legal AI solutions maintain granular retention settings and full traceability, ensuring compliance with HIPAA, GDPR, and SOC 2 frameworks.

About Plavno

Why choose Plavno?

Proven by our
customers feedback

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AI-first Delivery

AI-first Delivery

Senior engineers + proven AI components to accelerate time-to-value.

800+ Projects Delivered

800+ Projects Delivered

From MVPs to enterprise platforms at global scale.

Full-stack Team

Full-stack Team

From extension UX to GPU pipelines and global scale.

Testimonials

We are trusted by our customers

“They really understand what we need. They’re very professional.”

The 3D configurator has received positive feedback from customers. Moreover, it has generated 30% more business and increased leads significantly, giving the client confidence for the future. Overall, Plavno has led the project seamlessly. Customers can expect a responsible, well-organized partner.
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Sergio Artimenia

Commercial Director, RNDpoint

Sergio Artimenia

“We appreciated the impactful contributions of Plavno.”

Plavno's efforts in addressing challenges and implementing effective solutions have played a crucial role in the success of T-Rize. The outcomes achieved have exceeded expectations, revolutionizing the investment sector and ensuring universal access to financial opportunities
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Thien Duy Tran

Product Manager, T-Rize Group

Thien Duy Tran

“We are very satisfied with their excellent work”

Through the partnership with Plavno, we built a system used by more than 40 million connected channels. Throughout the engagement, the team was communicative and quick in responding to our concerns. Overall, we were highly satisfied with the results of collaboration.
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Michael Bychenok

CEO, MediaCube

Michael Bychenok

“They have a clear understanding of what the end user needs.”

Plavno's codes and designs are user-friendly, and they complete all deliverables within the deadline. They are easy to work with and easily adapt to existing workflows, and the client values their professionalism and expertise. Overall, the team has delivered everything that was promised.
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Helen Lonskaya

Head of Growth, Codabrasoft LLC

Helen Lonskaya

“The app was delivered on time without any serious issues.”

The MVP app developed by Plavno is excellent and has all the functionality required. Plavno has delivered on time and ensured a successful execution via regular updates and fast problem-solving. The client is so satisfied with Plavno's work that they'll work with them on developing the full app.
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Mitya Smusin

Founder, 24hour.dev

Mitya Smusin

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