SEM Optimiser
What SEM Optimiser is
SEM Optimiser is a search engine marketing platform available through an API. It provides keyword research, rank tracking, site audits, backlink analysis, and competitor research. Plans define allowances for sites, audited pages, tracked keywords, and API calls. The Free plan costs nothing, billed monthly, and includes one site, 50 audited pages, 50 tracked keywords, and 100 API calls per day. Marketing costs $49 a year, billed annually, with three sites, unlimited page audits, and 2,000 tracked keywords. Management costs $99 a year, billed annually, and includes 10 sites, unlimited page audits, 10,000 tracked keywords, and 100,000 API calls per day. Enterprise offers unlimited sites and tracked keywords, but no price is listed. The pricing note also lists a 14-day trial. Its API platform and tiered limits make the plan allowances central when choosing a capacity level.
Who it suits
SEM Optimiser suits marketers or developers needing keyword, ranking, audit, backlink, and competitor data through an API. The free tier fits smaller projects, while paid plans support more sites and tracked keywords.
What it does well
- Free plan available
- Keyword research and rank tracking
- Site audits and backlink analysis
- Competitor research included
- API access provided
What to know first
- Free tier limits one site
- Free plan has 50 tracked keywords
- Paid plans are billed annually
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| Free | billed monthly · 50 pages audited · 1 site · 50 tracked keywords · 100 API calls/day | Free |
| Marketing | billed annually · 3 sites · Unlimited pages audited · 2,000 tracked keywords | $49 a year |
| Management | billed annually · 10 sites · Unlimited pages audited · 10,000 tracked keywords · 100,000 API calls/day | $99 a year |
| Enterprise | Unlimited sites · Unlimited tracked keywords | On request |
As semoptimiser.com lists them, read 21 Sept 2026. The maker's own page has the final word.
Verdict
SEM Optimiser offers core SEO research and monitoring functions with API access and clearly defined capacity tiers. Start with the free allowance or move to paid plans when site, keyword, or API limits require expansion.
Facts from SEM Optimiser's own pages
- API access
- Yes · semoptimiser.com, 21 Sept 2026
- Backlink analysis
- Yes · semoptimiser.com, 21 Sept 2026
- Competitor research
- Yes · semoptimiser.com, 21 Sept 2026
- Free plan
- Yes · semoptimiser.com, 21 Sept 2026
- Keyword research
- Yes · semoptimiser.com, 21 Sept 2026
- Rank tracking
- Yes · semoptimiser.com, 21 Sept 2026
- Site audit
- Yes · semoptimiser.com, 21 Sept 2026
- Paid from
- 49 · semoptimiser.com, 21 Sept 2026
- Tracked keywords
- 2000 · semoptimiser.com, 21 Sept 2026
Where SEM Optimiser stands on Freedom251
- SEO tools#74 of 245