TwinLedger Sync — CRDT-powered bi-directional data twin
10/10
Demand Score
Teams are overwriting each other’s changes or living with divergent truths between CRM/ERP/support tools, causing revenue leakage and compliance risk.
8/10
Blue Ocean
Competition Level
$2k-8k
Price/Month
Predicted customer spend
12 days
Time to MVP
Difficulty: Hard
The Problem
A bi-directional sync layer that creates a virtual "twin ledger" per entity across systems. Uses field-level CRDT merge strategies, per-attribute lineage, and idempotent diff/patch application. Ingest
🔗 Validated by Real User Complaints
This problem has been verified through 5 real user complaints:
Competitor Landscape
- MuleSoft Anypoint
- Workato
- Tray.io
- Hightouch Reverse ETL
- Confluent Kafka Connect
- Debezium (DIY)
Must-Have Features for MVP
Field-level CRDT merge policies (last-writer, causal, custom code)
Per-field lineage and time-travel diffs
Dry-run/simulate with sampled traffic
CDC + webhook + polling adapters with exactly-once replays
Conflict inbox with auto-suggested resolutions
Reverse-ETL patch generator with idempotency keys
Schema drift auto-adaptation and alerting
⚠️ Potential Challenges
- Designing safe conflict policies stakeholders accept
- Establishing stable identity keys across systems
- Ordering changes under API/webhook jitter
- API rate limits and backoff
- Auth scopes for reverse writes
Risk Level: High
🎯 Keys to Success
- <0.5% unresolved conflicts after 30 days
- Zero data loss during cutover and replays
- 50–80% fewer manual reconciliations
- <5 minutes median conflict triage time
- Successful bidirectional sync in first two target systems within 2 weeks
Ready to Build This?
This hard-difficulty project could be your next micro-SaaS success.