OceanAlt vs SingleFax

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

OceanAlt compared with SingleFax
Detail	OceanAlt	SingleFax
What it does	Free address-screening API for pre-payment risk decisions on agentic payments	Send one-time faxes online from $0.99, pay only if delivered
Stage	Not given	Not given
Founded	Not given	Not given
Based in	HK	US
Pricing model	Not given	Not given
Pricing	Free: 2,000 calls/month at 60/min (no signup) or 5,000/month at 180/min with email; registered agent credential 50,000/month at 300/min. Team plan $49/month or $490/year (founding price). Pay-per-call: $0.002 per decision, $0.10 for 100 calls (x402), $0.01 per deep trace or batch.	One-time fax: from $0.99 for up to 10 pages, then $0.08 per extra page (max 1,000 pages), pay only if delivered. 30-day fax number: $4.99 one-time payment. Lifetime Basic fax number: $97 one-time payment. Lifetime Pro fax number: $147 one-time payment. Standard Plan (monthly): $6.58/mo or $79/year (
Key features	Single address risk screening Batch screening up to 25 addresses Fund-flow analysis on Tron and EVM Pre-payment decision API (allow/review/decline) Payee validation API Payment request validation Webhook signatures and monitoring Post-payment address monitoring Support for 8 EVM chains, Tron, Solana, Bitcoin and XRP Ledger Verifiable evidence and sources for every verdict	Send faxes from browser, email, or mobile app Pay only if delivery succeeds Support for up to 1,000 pages per fax Timestamped delivery confirmation Searchable AI transcripts for received faxes HIPAA Secure workflow with signed BAA IRS form filing with carrier proof Chrome extension for PDF faxing
What makes it different	No signup required for free tier CORS-enabled for browser and agent calls Machine-readable OpenAPI 3.1 specification Idempotent requests for safe retries Verdicts include verifiable settlement attestations	No account or subscription required for one-time faxes Pay only if fax delivers successfully Integrated IRS filing with official transmission proof Lifetime fax numbers with no monthly rental fees
Free plan	Not given	Not given
Open source	Not given	Not given
Platforms	Not given	Not given
Public API	Not given	Not given
Community votes	0	0
DR (Domain Rating by Ahrefs)	3 no change since last check	25 no change since last check
Trust Flow (Majestic)	3	1
Citation Flow (Majestic)	28	27
Referring domains (Majestic)	43	36

5 details filled in for both companies.

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