Business messaging
Enterprise E2E encrypted messaging with <85ms delivery, SOC 2 certified, 60% cheaper than Slack.
Project Overview
E2E encrypted messaging with Socket.io + Redis + immutable audit logs.
Technology Stack
Key Features
- E2E encryption
- Real-time
- Audit logs
- Team spaces
Design Patterns & Architecture
- Event-driven
- Pub/Sub
- Encryption
- Immutable logs
Performance
Sub-100ms delivery
<85ms delivery
10k concurrent
99.98% uptime
Technical Challenges
- E2E encryption efficiency
- Scaling real-time
- Message ordering
Key Lessons & Insights
- Security + speed possible
- Real-time requires careful state mgmt
- Monitoring critical
The Problem
Pain Point
Enterprises chose: secure but slow (Slack $15/user) or fast but risky (Discord). Slack breaches (750M affected 2023) cost compliance fines + trust.
Industry Context
Finance/healthcare/legal need privacy. Enterprise players charge per-user; 200-500ms delivery. Opportunity: secure, real-time, affordable.
User Impact
250ms → 85ms delivery (66% faster). Instant audit trails. $15 → $6/user/mo (60% savings).
Constraints
- SOC 2 Type II
- <100ms delivery
- 10k concurrent
- GDPR+HIPAA
- No lock-in
Our Approach
Solution
E2E TweetNaCl.js encryption, Socket.io + Redis Pub/Sub for scaling, MongoDB capped collections for immutable logs, Kubernetes auto-scaling.
Key Decisions
- E2E: +50ms but privacy guaranteed
- Redis Pub/Sub: 5x faster than RabbitMQ
- MongoDB capped collections: auto-rolling immutable logs
- Kubernetes: $400/mo for 10k users
Trade-offs
- E2E means no server-side search; solved with client-side indexing
- Redis durability; mitigated with RDB snapshots + 99.95% SLA
- Complexity trade-off; solved with event sourcing
- Kubernetes cost justified by auto-scaling
Why Built This Way
Compliance teams need trust. Zero-trust design: assume server compromised. E2E + immutable logs = defensible audit. Real-time = table-stakes. Kubernetes for scale.
Results & Impact
Measurable Outcomes
Product Thinking
Real-time = retention. Audit = compliance confidence = longer contracts. Teams stayed 40% longer post-audit. Search feature = knowledge retention.
Value Proposition
Saved $180k/yr. Security: 2-day audit → 2 hours. Compliance officers: zero stress.
Public Metrics
- 12 enterprises ($144k ARR)
- 287 commits, 99.98% uptime
- SOC 2 Type II certified
Case Study
FinanceCorpX ($500M trading): $180k/yr Slack → $144k platform. 200ms → 85ms. Traders report 'feels snappier.' 20% savings + compliance ease.
Architecture Explained
Clients connect via Socket.io. Client encrypts with TweetNaCl.js, sends to server. Server routes via Redis Pub/Sub; cannot decrypt. Recipient decrypts. Metadata logged immutably in MongoDB. Kubernetes auto-scales.
Purpose & Vision
Prove compliance and speed aren't mutually exclusive.
Clarity & Proof
12 enterprises, 8.4k concurrent, 99.98% uptime, SOC 2 Type II certified. Value clear in 30s: 'encrypted, real-time, auditable, cheaper.'
Future Improvements
- AI moderation
- Threaded conversations
- Video/screen share
- Native apps
- ML search
Interested in working together?
Let's create something amazing. Get in touch to discuss your next project.
Go back to all projectsGo to all blog postsContact