I have tried a ton of different form plugins on the market, and nothing comes close to WS Form. It has incredibly powerful features like full ACF integration, multi-step forms, and an easy-to-use API.
More so, the support is amazing. The team went way out of their way to help me fix an issue that a 3rd party script was causing. In less than 15 minutes, they sent me a detailed reason for the issue, complete with screenshots and an easy way to move forward.
I use this plugin on all my customer’s websites, and it has not let me down once.