FilingFirehose vs sec-api.io

sec-api.io has the broader form catalog and stronger brand recognition. FilingFirehose is narrower, cheaper, and parses 8-K body text for misclassified events.

Side-by-side

Feature	FilingFirehose	sec-api.io
Starting price	$29/mo	$300+/mo
Form types covered	8-K, S-3 / 424B5, 13D / 13G	Most SEC forms
8-K body-text classification	Yes (discrepancy_items + suspected_buried_events)	No
Activist filer detection on 13D	21+ filers tagged automatically	Manual lookup
ATM-offering detection on S-3 / 424B5	Yes (sales agent + shelf size)	Form-level only
Latency from filing to API	~15s p50	Comparable
Self-serve via Stripe	Yes	Sales-led on most tiers

When FilingFirehose is the right call

You want body-text-parsed 8-K items — including a flag for filings where the body language suggests a different item than what the filer reported. You're at the $29–$299/mo tier and don't need enterprise contracting.

When sec-api.io is the right call

You want a much broader form-type catalog beyond the 8-K / S-3 / 13D core, you're willing to pay enterprise pricing, and brand recognition matters for an internal tooling pitch.