Yes — SMS sits alongside email and push; as of a 2026 update it is a pay-as-you-go add-on on the Pro plan (from ~$0.007/SMS in the US) — https://saaskart.co/sof
Yes — Brevo supports SMS and WhatsApp campaigns alongside email, using pay-as-you-go message credits, for true multichannel campaigns and transactional messagin
Yes — ActiveCampaign supports SMS within automations, so you can add text messages to journeys alongside email using the same triggers and data — https://saaska
Yes — Klaviyo supports SMS and MMS alongside email on shared profiles and flows, billed with message credits based on destination and message type — https://saa
