Sender
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Sender combines email, SMS, and automation in one platform with industry-leading 99.98% deliverability. The free plan supports 2,500 subscribers, and live 24/7 support is available across all tiers. Built for reliability, it's grown since 2012 to serve businesses worldwide.
Best for teams wanting SMS alongside email without switching tools. It's stronger on deliverability than many cheaper alternatives, making it worth considering if your industry depends on high inbox rates.