Free top 10 of 299
| # | Company | City | Industry | Staff | 1-yr growth |
|---|---|---|---|---|---|
| 1 | Radley Engineering | Norwich | Publishing | 100-249 | 200%+ (estimated) |
| 2 | Outdoor Revolution | Dewsbury | Sporting & Recreational Equipment Retail | 10-19 | 200%+ (estimated) |
| 3 | Centurion Truck Rental | Manchester | Car & Truck Rental | 10-19 | 200%+ (estimated) |
| 4 | MedTree | Telford | Vitamins, Supplements & Health Stores | 20-49 | +150% |
| 5 | The Prince of Wales | Birmingham | Non-Profit & Charitable Organizations | 50-99 | +144.4% |
| 6 | Equilibrium Products | Leighton Buzzard | Sporting & Recreational Equipment Retail | 10-19 | +133.3% |
| 7 | Gm Packaging (UK) | Newcastle Upon Tyne | Office Products Retail & Distribution | 20-49 | +114.2% |
| 8 | Natures Menu | Norwich | Pet Products | 250-499 | +100% |
| 9 | Keplin Group | Stratford-Upon-Avon | Pet Products | 100-249 | +100% |
| 10 | Candle Shack | Falkirk | Household Goods | 100-249 | +100% |
Edition October 2026. Source: licensed B2B firmographic and technographic data. Company-level only.
What the data shows
- Median 1-year headcount growth across the 299 Klaviyo users: +26%.
- 15 of 299 (5%) at least doubled headcount in a year (figures over 200% are estimates).
- Biggest industries: Apparel & Accessories Retail (31), Food & Beverage (28), Home Improvement & Hardware Retail (20).
- London has the most (97 of 299, 32%); the list spans 144 towns and cities.
- Size mix: 194 under 50 staff, 92 with 50–199, 13 with 200+ (median 25 employees).
Get all 299: $19
CSV + Excel + PDF with website, size, growth and revenue bands and a careers search link for every company.
Secure card checkout by Dodo Payments. Your files (CSV, Excel, PDF) are emailed to your checkout address, normally the same day; questions: labskaruna@gmail.com. One-time payment. 14-day money-back guarantee (refund policy).
Notes and limits
- Klaviyo detected on the public web by licensed B2B firmographic and technographic data: a floor, not a census.
- Companies with 10–500 staff whose headcount grew 10%+ in a year, sorted by 1-year headcount growth (highest first). This is a sort order, not a ranking of every Klaviyo user.
- Growth is the exact 1-year headcount change, rounded. Anything of 200% or more is shown only as "200%+ (estimated)" (small teams make such figures unreliable), and inside that group companies are listed largest first.
- Likely branches of larger groups are left out.
- Company-level data only: no personal contacts.
Related lists
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- Growing companies using HubSpot in Canada (295 companies)
- Growing companies using HubSpot in Germany (297 companies)
- Growing companies using HubSpot in the UK (296 companies)
- Growing companies using HubSpot in the US (297 companies)
- Growing companies using Klaviyo in Australia (298 companies)
- Growing companies using Klaviyo in Canada (293 companies)
- Growing companies using Klaviyo in Germany (88 companies)
FAQ
- How do you know they use Klaviyo?
- Klaviyo was detected on the company's public web presence (licensed B2B firmographic and technographic data). Detection misses some users, so treat it as a floor.
- Why only growing companies?
- Growing companies buy services, integrations and add-ons. Companies that did not grow at least 10% are excluded so the list is worth calling.
- What do I get for $19?
- All 299 companies with website, city, industry, size, growth and revenue bands, as CSV, Excel and PDF. No personal contacts.