The world of buy now, pay later technology — built by startups like Klarna, Afterpay and Affirm — introduced shoppers to payment plans that cut big shopping tabs into smaller bills. Plus interest, in some cases.

Arad Levertov, the CEO and co-founder of Westwood-based Sunbit, is after a different demographic. His version is only for "essential" buys: consumers facing hefty bills at the dentist, optometrist or car repair shop.

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Cell therapy has taken the oncology world by storm.

For cancer patients who have tried every other treatment, cell therapies not only have the potential to kill cancer cells in the moment, but they can multiply and continue bolstering the immune system in the future. But the treatment — often used only as a last resort — is expensive, time-consuming and potentially fatal.

Appia Bio, a Westwood-based biotech startup that came out of stealth on Tuesday, hopes to speed up the process with a new type of treatment known as allogeneic cell therapies. The company is armed with $52 million in Series A funding led by venture capital firm 8VC.

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