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Scell.io vs Wave Accounting
Wave free US/CA vs Scell.io EU-compliant API
Wave is a free accounting and invoicing platform (freemium model, monetisation via payments and payroll) very popular with freelancers in the US and Canada. The GraphQL API is limited and not intended for heavy third-party integration. Wave does not support Factur-X nor French compliance. Scell.io is not free (€0.04/invoice) but targets a very different segment: European developers and IT services companies needing to comply with the mandatory 2026 e-invoicing reform, with SDKs and multi-tenant architecture for B2B2B.
Key facts
- Wave: free, freemium (paid payroll/payments)
- Scell.io: pay-as-you-go €0.04/invoice
- Wave: limited GraphQL API, no SDK
- Scell.io: official PHP/JS/MCP SDKs
- Wave: zero Factur-X / France support
- Scell.io: Factur-X 5 profiles + ISCA + signature
Code example
# Scell.io — vérifier la conformité ISCA d'un tenant
curl -X GET https://api.scell.io/api/v1/fiscal/integrity \
-H "X-API-Key: sk_live_xxx"
# → { "hash_chain_valid": true, "entries_count": 4521, "last_anchor": "..." }