If you run an agency, hosting is not a cost line — it is a product you resell. The host you pick decides your gross margin on every care plan, how cleanly you can white-label, and whether a client's traffic spike eats your profit or theirs. So this comparison is written for operators, not hobbyists.
We focus on three hosts that genuinely target agency workloads: Cloudways, Kinsta, and WP Engine. The headline split is economic. Cloudways bills per server, so you can stack many sites onto one box. Kinsta and WP Engine bill per site (technically per install), with monthly visit caps. That single difference reshapes your unit economics more than any feature checklist. Everything below is based on each host's published specs and pricing as of June 2026 — not hands-on testing.
The core split: per-server vs per-site
Cloudways' Flexible plans bill per server, not per site. The cheapest DigitalOcean server is $11/mo and carries unlimited websites and unmetered visits. You provision a box, scale its RAM/CPU on demand, and pack as many client sites onto it as it can handle. Billing is hourly pay-as-you-go with no annual lock-in and — importantly for resellers — no intro-versus-renewal trap. The $11 is the ongoing price.
Kinsta and WP Engine bill per WordPress install with a hard monthly visit allowance. Kinsta's WP 10 plan is $187.50/mo effective on annual ($2,250/yr) for 10 installs and 315,000 visits. WP Engine's Growth is $109/mo (first-year Essential intro) for 10 installs and 100,000 visits, billing overage at $2 per 1,000 extra visits. So one busy client site can consume the visit budget you'd hoped to spread across ten.
The operator takeaway: per-server gives you elastic margin and spike absorption; per-site gives you isolation and predictable per-client support, but your cost scales with both site count and traffic.
Care-plan margins, by the numbers
Margin is the whole game. On Cloudways, a single $11–$14/mo DigitalOcean server hosting, say, ten small client sites costs you roughly $1.10–$1.40 per site in raw hosting. If you bill each client a $50–$100/mo care plan, hosting is a rounding error and the rest is your maintenance, updates and support margin. The catch: Cloudflare Enterprise CDN (from $4.99/domain/mo) and offsite backups (~$0.033/GB) are paid add-ons, so factor those into the plan.
Kinsta and WP Engine invert this. On Kinsta's WP 10, your floor is ~$18.75 per site/mo before your own labor; WP Engine Growth is ~$10.90 per site/mo at intro. That's a higher cost base, but you get isolated installs, bundled CDN, daily/backups and managed support included — fewer things you have to operate yourself.
If your model is high-volume, low-touch sites, per-server wins on margin. If it's fewer, higher-value clients who'll pay for premium support and you don't want to run servers, per-site is defensible.
White-label and multi-site dashboards
For client-facing professionalism, the dashboard and white-label story matters. Kinsta's published ladder runs from a single 35k-visit site up to the Agency 60 plan (60 installs, 1,250,000 visits, $562.50/mo effective / $6,750/yr), which adds SAML SSO and the Kinsta API — useful if you want to wire site provisioning into your own client portal. Dedicated account management appears on higher tiers.
Cloudways gives you one control panel across all servers and sites, plus the ability to add team members and stage freely. WP Engine scales from 1 site (Startup) to 30 sites (Scale, $276/mo intro) on Essential, with managed bulk migrations and senior support arriving on the quote-based Core tier.
Note the honest gaps: none of these data points include detailed reseller-branding or invoicing-automation specifics, so confirm the exact white-label and client-billing features with each host before you build your portal around them.
Support and reliability you can promise clients
When you resell, you inherit the host's SLA as your own promise. Kinsta publishes a 99.9% uptime guarantee (downtime must exceed ~43 min/month before credits apply); a 99.99% figure is only offered on custom plans. WP Engine publishes a 99.99% SLA only on its Core (dedicated/isolated) tier, which starts at $400/mo and is quote-based — the shared-resource Essential plans carry no specific numeric SLA on the plans page. Cloudways publishes no uptime SLA on Flexible plans at all; your reliability rides on the underlying cloud provider's own SLA (DigitalOcean, AWS, etc.).
Support tiers differ too. Kinsta includes 24/7 expert support on every plan. WP Engine offers phone support from the Professional tier up (not chat-only). Cloudways provides 24/7 platform support, but server scaling decisions are your responsibility.
If a client contract demands a credit-backed uptime SLA, only Kinsta (on every plan) and WP Engine Core give you a published number to point to.
WP Engine's enterprise and isolated programs
WP Engine is the most enterprise-leaning of the three. Beyond the Essential ladder (Startup/Professional/Growth/Scale), its Core plan starts at $400/mo with isolated resources, a 99.99% uptime SLA, NitroPack included, fast-track senior support and managed bulk migrations — the kind of offering you'd put under a large client or a portfolio you can't risk on shared resources.
One operator caveat on cost predictability: WP Engine's advertised $30/$55/$109/$276 rates are first-year Essential intro pricing, and WP Engine does not publish the renewal figure. For an agency modeling multi-year client contracts, that's an unknown in your cost base. Kinsta is the opposite here — its annual rate renews at the same price, with no separate higher renewal, which makes long-term care-plan pricing easier to lock down.
Which model fits your agency
Pick Cloudways if you host many small-to-mid client sites, want the fattest care-plan margins, and are comfortable making server-scaling calls. The $11/mo entry, unlimited sites per server, hourly billing and no renewal hike are built for resellers — just budget for the CDN and backup add-ons and accept there's no Flexible-plan SLA.
Pick Kinsta if you want flat, predictable pricing that renews at the same rate, a published SLA on every plan, and a clean scaling ladder up to 60 installs with SSO and an API for portal integration. You pay more per site, but you don't run servers.
Pick WP Engine if you need an enterprise/isolated option (Core, 99.99% SLA) under high-value clients, want phone support from mid-tier up, and can live with intro pricing whose renewal isn't published.
The verdict
There is no single best agency host here — there's a best billing model for your business. If your portfolio is dozens of modest client sites and you want to maximize the spread between hosting cost and care-plan revenue, Cloudways' per-server economics ($11/mo for a server holding unlimited sites and unmetered visits, hourly billing, no renewal hike) is hard to beat — provided you'll manage scaling and pay separately for CDN and offsite backups, and you don't need a published uptime SLA on the Flexible tier.
If you'd rather not run servers and want pricing you can quote to clients for years without surprises, Kinsta is the cleaner operator choice: flat pricing that renews at the same annual rate, a 99.9% SLA on every plan, and an Agency 60 tier with SSO and API for portal automation. WP Engine sits as the enterprise pick — its Core tier (from $400/mo, 99.99% SLA, isolated resources) is the strongest story for high-value clients, but its unpublished Essential renewal pricing is a real planning gap for multi-year contracts. Match the model to how you sell, and the host follows.