SignalSumo
by SignalSumo
What SignalSumo is
SignalSumo is an API-based SEO research and monitoring service from SignalSumo in San Francisco. Its listed tools cover keyword research, rank tracking, site audits, backlink analysis and competitor research. The service offers a free plan, paid plans from $49 a month and a 7-day trial. The Free plan includes one tracked keyword, one backlink gap report, one local SEO location pack, two content optimizer reports and one uptime monitor. Mid costs $49 a month and supports five tracked projects or domains, 100 tracked keywords, 20 monthly SEO audit reports, audits of up to 5,000 crawled pages, 25 keyword searches and 20 API calls. Pro costs $99 a month with 750 keywords, while Agency costs $249 a month with 2,000 keywords. Higher plans also increase project, search, report, user and API allowances.
Who it suits
SignalSumo suits SEO practitioners who need keyword, ranking, audit, backlink and competitor tools through an API platform. Its plan limits also accommodate solo users and larger agency teams.
What it does well
- Covers keyword and competitor research
- Includes rank tracking and site audits
- Free plan available
- Provides API access
- Agency plan supports 2,000 tracked keywords
What to know first
- Free plan tracks one keyword
- Paid plans begin at $49 a month
- Plan allowances limit projects, searches and API calls
- Only API platform is listed
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| Free | billed monthly · 1 tracked keyword · 1 backlink gap report · 1 local SEO location pack · 2 content optimizer reports · 1 uptime monitor | Free |
| Mid | billed monthly · 5 tracked projects/domains · 100 tracked keywords · 20 SEO audit reports per month · 5,000 crawled pages per audit · 25 keyword searches per month · 20 API calls per month | $49 a month |
| Pro | billed monthly · 10 tracked projects/domains · 750 tracked keywords · 10 SEO audit reports per month · 30 keyword searches per month · Up to 2 users · 20 API calls per month | $99 a month |
| Agency | billed monthly · 25 tracked projects/domains · 2,000 tracked keywords · 30 SEO audit reports per month · 200 keyword searches per month · Up to 5 users · 100 API calls per month | $249 a month |
As signalsumo.com lists them, read 21 Sept 2026. The maker's own page has the final word.
Verdict
SignalSumo combines several SEO research and monitoring functions with API access and tiered limits. The free tier is small, while paid plans expand tracking, audits, searches and team capacity.
Facts from SignalSumo's own pages
- API access
- Yes · signalsumo.com, 21 Sept 2026
- Backlink analysis
- Yes · signalsumo.com, 21 Sept 2026
- Competitor research
- Yes · signalsumo.com, 21 Sept 2026
- Free plan
- Yes · signalsumo.com, 21 Sept 2026
- Headquarters
- San Francisco, California, USA · signalsumo.com, 28 Sept 2026
- Keyword research
- Yes · signalsumo.com, 21 Sept 2026
- Rank tracking
- Yes · signalsumo.com, 21 Sept 2026
- Site audit
- Yes · signalsumo.com, 21 Sept 2026
- Paid from
- 49 · signalsumo.com, 21 Sept 2026
- Tracked keywords
- 100 · signalsumo.com, 21 Sept 2026
Where SignalSumo stands on Freedom251
- SEO tools#82 of 245