How services are scored
The criteria, the weights, the sources, and what the ranking does not measure.
Last updated
Every service in this directory is scored out of 10 on six published criteria. The weights are below so the ranking can be argued with rather than taken on trust.
The model deliberately weights independently checkable evidence above marketing claims. In a category where every provider says the same things — real followers, no bots, organic growth — the question that separates them is which claims a buyer can actually verify before paying.
The six criteria
| Criterion | Weight | What it measures |
|---|---|---|
| Rating quality | 25% | Not the headline score alone. Half the mark is the Trustpilot score; half is the share of reviews that are NOT one-star. A 4.9 built from 54% five-star and 29% one-star is a different thing from a 4.8 built from 97% five-star and 2% one-star, and the headline number hides that. |
| Verifiable proof | 25% | Whether the service publishes named client accounts a reader can open and check, and whether it publishes before-and-after figures. Testimonials with first names only score nothing; linked, checkable public accounts score highest. |
| Rating currency | 10% | The share of a service's reviews written in the last 12 months. Trustpilot's TrustScore weights recent reviews more heavily, so a high score resting on a handful of recent reviews describes a much smaller sample than the total suggests. |
| Track record | 15% | Years in continuous operation, from the company's own stated founding date. Services that do not publish a founding date cannot be credited for one. |
| Method disclosure | 15% | Whether the service states plainly how growth is produced, and what that method is. Manual human outreach scores highest on account safety; disclosed automation scores mid; undisclosed lowest. |
| Buyer protection | 10% | Refund and trial terms. A money-back guarantee outscores a free trial, and a longer window outscores a shorter one. |
Where the data comes from
- Ratings are read directly from each company's public Trustpilot profile, not quoted from third parties. Every service page links to its source profile.
- Method, pricing, founding dates and guarantee terms are taken from each company's own public website, quoted where the wording matters.
- Unknowns stay blank. Where a company does not publish something, it is recorded as "not published" rather than estimated. A blank is never scored as if it were a low value; it simply earns no credit on criteria that reward disclosure.
- Everything is dated. Figures were checked on 15 August 2026. Ratings move, so the linked profile is always authoritative over the number reproduced here.
Services with no independent rating
A service with no third-party rating is not the same as a service rated badly, and the two are not shown the same way. Where no independent rating exists, the rating cell reads No rating rather than a number, and the service is excluded from every rating-derived figure on this site — the score range, the counts of services rating above and below Virallized, and the “highest rated” label. It is still scored and still ranked.
On the two criteria that measure the rating itself — rating quality and rating currency, 35% of the model combined — an unrated service scores zero. That is a deliberate choice, and the reasoning is worth stating plainly: those criteria exist to reward evidence a buyer can check against a source the seller does not control. A company with no such evidence earns no credit there. It is not a penalty for being new or small, and it is not a judgement about service quality — a service with no reviews may be excellent. It means only that the claim cannot be verified before purchase, which is the specific thing this model measures.
Those services can still score on track record, method disclosure and buyer protection, all of which are read from their own websites. GrowthViral is currently the only entry in this position.
What this ranking does not measure
Two things worth being explicit about.
- It is not a test. No service in this directory, including Virallized, has been bought and run head-to-head under controlled conditions. The scores measure published evidence and independent review records, not a bake-off.
- A different weighting gives a different winner. Scored on the headline Trustpilot number alone, Stellation Media ranks first at 4.9, ahead of Virallized's 4.8. That figure appears in every table on this site rather than being buried — alongside the fact that 29% of its lifetime reviews are one-star and only 6 were written in the last 12 months. If the headline number alone is what matters to you, weight it that way; every underlying figure is published.
- Scores are not a measure of outcome. They measure published evidence and independent review records. A service could score poorly here and still work well for a particular account, or score well and be a poor fit.