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Olign — Speech-To-Text Alignment Service

More accurate word timestamps than Montreal FA and WhisperX.

A forced-alignment service that emits word- and phone-level timings with a per-phone confidence proxy.

REST ยท BETA https://api.olewave.com/Olign/v1

The public REST API is in closed beta. Contact us to request a testing token and access.

Word Timestamp Accuracy

0.0 0.2 0.4 0.6 0.8 1.0 F1 0.802 Olign 0.730 MFA 0.149 WhisperX Quiet 0.737 Olign 0.659 MFA 0.152 WhisperX Noisy
OlignMFAWhisperX
Word-boundary F1 @ 20 ms tolerance — a boundary is counted correct if it lands within 20 ms of the gold-standard boundary. Higher is better. Evaluated on the TIMIT core-test and Buckeye test splits as defined in FA-Bench, under its fabench protocol on speaker-disjoint held-out utterances. Baselines: Montreal FA (MFA) 3.4 and WhisperX v3.1.

Request beta access to Olign.

The REST API is in closed beta. Get a testing token, run Olign against your workload โ€” batch cleaning, real-time captioning, pronunciation assessment, dataset labeling โ€” and see the numbers on your own data.

Contact Olewave for a beta token โ†’