How to Migrate from Monix to ZIO?

Monix's Task[A] can be easily replaced with ZIO's Task[A] (an alias for ZIO[Any, Throwable, A]). Translation should be relatively straightforward. Below, you'll find tables showing the ZIO equivalents of monix.eval.Task's methods.

Once you've completed the initial translation, you'll find that ZIO is outfitted with many additional methods which have no Monix equivalents, so have fun exploring the API and see if you can rewrite some of your logic at a higher level of abstraction, with more powerful combinators and fewer lines code.

If you are using operators from Cats Effect extension methods see also here.

Methods on Trait

Monix	ZIO
attempt	either
bracketCase	acquireReleaseExitWith
bracketE	acquireReleaseExitWith
bracket	acquireReleaseWith
delayExecution	delay
dematerialize	absolve
doOnCancel	onInterrupt
doOnFinish	onExit
failed	flip
flatMap	flatMap
flatten	flatten
guaranteeCase	ensuringExit
guarantee	ensuring
loopForever	forever
materialize	either
memoize	memoize
onErrorFallbackTo	orElse
onErrorHandleWith	catchAll
onErrorRecoverWith	catchSome
onErrorRestart	retryN
redeemWith	foldZIO
redeem	fold
restartUntil	repeatUntil
start	fork
timed	timed
timeout	timeout
uncancelable	uninterruptible

Methods on Companion Object

Monix	ZIO
apply	apply
asyncF	asyncZIO
async	async
cancelable	asyncInterrupt
deferFuture	fromFuture
defer	suspend
delay	attempt
eval	attempt
fromEither	fromEither
fromFuture	fromFuture
fromTry	fromTry
map2	mapN
mapBoth	mapParN
never	never
now	succeed
parMap2	mapParN
parSequenceN	collectAllParN
parSequence	collectAllPar
parTraverseN	foreachParN
parTraverse	foreachPar
parZip2	tupledPar
pure	succeed
racePair	raceWith
race	raceFirst
raiseError	fail
sequence	collectAll
shift	yield
sleep	sleep
suspend	suspend
traverse	foreach
unit	unit

Data Structures

Monix / Cats Effect	ZIO
Deferred	Promise
Fiber	Fiber
MVar	Queue
Ref	Ref
Semaphore	Semaphore
TaskApp	App
TaskLocal	FiberRef
Task	Task