Ultimate Multisite vs InstaWP WaaS
Multisite vs isolated installs: who actually owns the platform?
InstaWP runs a hosted, isolated-install model with a per-site cost basis. Ultimate Multisite is the open-source multisite plugin you run yourself — no per-site fees, no hosted-only lock-in, no Automattic gatekeeper. Here is when each makes sense.
TL;DR — pick the right tool for the job
Choose Ultimate Multisite if you…
- Want zero per-site fees as you scale to hundreds or thousands of customer sites
- Already run WordPress (multisite or otherwise) and want full ownership of the stack
- Need an open-source platform you can audit, fork, and self-host on your own infrastructure
- Want a real WordPress experience for end customers — full plugin/theme ecosystem, multilingual, every Gutenberg/Divi/Elementor option
- Are coming from WP Ultimo and want continuity, not a rewrite
Choose InstaWP WaaS if you…
- Refuse to run any infrastructure and want a fully managed hosted product
- Need each customer site fully isolated at the WordPress install level (a security/regulatory requirement, not a preference)
- Have ≤30 customer sites and the per-site cost is acceptable
- Value Automattic ecosystem alignment over open-source neutrality
- Need integrated Stripe Express onboarding without configuring it yourself
Side-by-side comparison
| Ultimate Multisite | InstaWP WaaS | |
|---|---|---|
| Licence model | Free, open source (GPL) | Proprietary SaaS |
| Source code | Public on GitHub, accept PRs | Closed |
| Self-hosting | Yes — any WordPress host | No — InstaWP infrastructure only |
| Per-site cost basis | None (multisite — one install serves all customers) | ~$5–9 per site via underlying hosting plan |
| Site count limit | Unlimited (host-bound) | 5 (Pro) / unlimited but per-site billed (Agency) |
| Plan starting price | $0 plugin · $19–$349/yr addons | $19/mo Pro · $49/mo Agency |
| White-label | Yes, included | $20/mo add-on (Pro) |
| Stripe integration | Yes (Stripe Connect proxy) | Yes (Stripe Express) |
| PayPal integration | Yes | Limited |
| WordPress plugin support | Full — every WordPress plugin | Full per-install — but you manage 1 install per customer |
| Multisite vs isolated | True multisite (shared core, isolated content) | Isolated installs (separate WordPress per customer) |
| Resource cost per site | Very low (multisite shares core) | Higher (full WordPress install per customer) |
| Vendor lock-in | None — your data, your host, your codebase | Total — hosted on InstaWP infra only |
| Multilingual | Polylang/WPML/Loco fully supported | Multilingual checkout |
| Migration in | From WP Ultimo or any multisite — direct | Migration tools to InstaWP only |
| Origin | Community fork of WP Ultimo (2024) | Founded 2021, Automattic-backed |
The hidden cost: per-site fees at scale
InstaWP’s Agency plan markets “unlimited sites” but each customer site sits on an underlying hosting plan that costs roughly $5–9/month. At 50 customer sites you are paying $49 in platform fees plus $250–$450 in underlying hosting — even before you have charged anyone.
With Ultimate Multisite, you bring your own host (a $30–$80/month VPS handles 100+ small customer sites comfortably). The plugin is free. There is no platform that charges you per customer site. Your gross margin compounds with each customer.
Try the open-source path
Install the free plugin on any WordPress multisite. Onboard your first customer in an afternoon. Migrate from InstaWP or WP Ultimo with our guides.