If you want an AI-powered way to get a better idea of what's most important in your newsletters and what you can skip, Summate is a good choice. The service uses GPT-4 technology to summarize your newsletters and offers different ways of reading them. It can send you daily or weekly digests so you can concentrate on the most important items. It offers two tiers of service, with the basic plan costing $3.99 per month for unlimited sources and 100 weekly summaries, or $9.99 per month for more features.
Another option is LaterOn, which not only collects and schedules your newsletters but also can summarize them with AI and present them without ads. Its Zen Mode lets you read uninterrupted, and the AI assistant can answer questions you might have about your newsletters. LaterOn has several tiers of service, including a free version, so you can find the one that works best for you and keep your inbox uncluttered.
SaneBox is another option. The service uses machine learning technology to try to sort incoming emails into folders you can focus on. That can help you concentrate on the most important messages. It also offers a daily digest to summarize non-priority emails and a Snooze feature for delayed responses. SaneBox works with several email services and is focused on protecting your data, so it's a good option if you're concerned about privacy when you're trying to get your email under control.