Wave's invoicing is free, which is hard to argue with. The trade-off is that Wave has spent the past three years moving features behind a paid Pro plan and ad-supported the rest. Influx Theory is paid up front and stays paid — no upsells, no ads, no surprises.
Wave wins on price if you can tolerate the upsell experience. Influx Theory wins on speed, design polish, and not being interrupted while you're trying to bill a client.
| Feature | Influx Theory | Wave |
|---|---|---|
| Price | $19/mo | Free (Pro plan $16/mo) |
| Ads in the app | None | Yes on the free plan |
| Unlimited invoices | Yes | Yes |
| Automated reminders | Included | Pro plan only |
| Recurring invoices | Included | Pro plan only |
| Custom branding | Included | Pro plan only |
| Card processing fee | 2.9% + 30¢ | 2.9% + 60¢ |
| Bank transfer fee | Free | 1% (min $1) |
Anyone who'd rather pay a small flat fee and never see an upsell prompt or ad while invoicing.
Side hustlers sending a handful of invoices a year who don't mind ads in exchange for free.
No credit card required. $19/mo after, unlimited everything.
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