How rankings work
Every business on Calibre gets a composite score from 0–100. The score is the weighted sum of 6 base dimensions plus 2 Nigeria-specific dimensions. No business can buy a higher rank — payment is never part of the score.
Scope. Calibre lists professional businesses. Borderline categories are listed only where a statutory licence or registration applies.
The 6 base dimensions
| Dimension | Weight | Source |
|---|---|---|
| Google rating | 21% | Google Business Profile |
| Review volume | 16% | Log-scaled by category peer max |
| Recency | 11% | Exponential decay over 12 months |
| Profile completeness | 11% | Has phone? website? photos? hours? |
| LLM sentiment | 16% | Claude Haiku analysis of review text |
| Verification | 10% | Claimed listing? Email-verified? |
Percentages are rounded. There is no paid-placement dimension — payment is never part of the score (algo version v2).
Nigeria-specific dimensions
These dimensions rely on Nigerian regulatory registries, so they are checked separately from review data.
- CAC registration (10%): Is the business legally registered with the Corporate Affairs Commission? Proves it's not a scam shell.
- Vertical-specific certification (5%): NMA for hospitals, NDA for dentists, NBA for lawyers, COREN for engineers. Cert checked against the regulator's published registry.
What the score means
- 80–100: Top-tier. Strong on every dimension.
- 60–80: Solid. Has at least one weak spot.
- 40–60: Mixed. Do your own checks and decide for yourself.
- 0–40: Below average for the category. Investigate before booking.
Why “no pay-to-win” matters
A ranking is only useful if the position can't be bought. Calibre doesn't sell placement of any kind — not a higher rank, not a labelled slot above the ranking, nothing. 100% of the score that determines rank is unbuyable, and there is no paid alternative to it.
When we update
There is no fixed daily or weekly re-scoring schedule published here. Every page shows its own generated and scored dates — check the date stamp on any listing or business page to see exactly how fresh its data is.
Disagreements + corrections
If you believe a listing is wrong, report it. If you own the business, claim your listing for free.