After Later Audio is a boutique Eurorack modular synthesizer company based in the Beacon Hill neighborhood of Seattle, Washington, run by Lenny and Clarissa. The company is widely known for producing compact, affordable hardware versions of modules from the now-discontinued French maker Mutable Instruments, building on the open-source firmware Mutable released on GitHub. Their Mutable-derived lineup includes uBurst, Monsoon, and Typhoon (variations on Clouds), Resonate (Rings), Dice (Marbles), and Cumulus (Clouds).

Beyond the Mutable clones, After Later Audio designs original modules and reworks of other modular staples. Notable originals and variants include QARV, the Storm random voltage source, Atom, Benjolin, and Cara, along with the Nightlife Mixer Series (Bartender, Barback, and Send VCA) aimed at live performance mixing. The company also produces guitar pedals, 1U Intellijel-format utilities, cases, and power supplies.

After Later Audio occupies a space in the Eurorack community between DIY and boutique manufacturing, catering to both newcomers assembling a first rack and experienced patchers looking for specific utilities or alternate takes on classic designs.

After Later Audio has 4 products cataloged on Equipboard, including Modular Synthesizers. Their gear is featured by 3 artists, with the strongest followings in Electronic, Pop, and Classical. Notable users include Andrew Huang, Sarah Belle Reid, and Hrdvsion.