Best AI tools to translation and localization

Short answer

DeepL ranks #1 for translation and localization (score 9.7/10). Pricing: €7.49/mo (EUR shown); free tier: yes. Runners-up: Smartling, Lokalise.

Top 5, ranked by our published rubric. Sponsorship never affects the order. Last updated 2026-10-13.

Compare the top 5 side by side

#	Tool	Score	Pricing	Paid from	Free tier	What it is
1	DeepL	9.7	Free tier	€7.49/mo (EUR shown)	yes	AI translation
2	Smartling	7.9	From $0.0075	Usage-based (MT from $0.0075/word)	unknown	AI translation and localization platform
3	Lokalise	6.7	From $149	Explorer $149/mo	no (trial)	Localization platform for software
4	Phrase	5.9	Unverified	Unverified	Unverified	Translation management and localization
5	Crowdin	5.2	Unverified	Unverified	Unverified	Localization management platform

Rank 1

DeepL

Free tierVisit DeepL (opens in a new tab)

AI translation

Score 9.7/10Paid from: €7.49/mo (EUR shown)Free tier: yesLast verified 2026-10-13

Why ranked: Its own site says: “Explore our AI suite and get more done: Translate speech, text, and media, or integrate the DeepL API.” We placed it 1st of 5 on fit for this task. Free tier; paid from €7.49/mo (EUR shown).

Fit 10.0 · value 10.0 · breadth 8 · availability 10 (how we score) · pricing source · site live

Rank 2

Smartling

From $0.0075Visit Smartling (opens in a new tab)

AI translation and localization platform

Score 7.9/10Paid from: Usage-based (MT from $0.0075/word)Free tier: unknownLast verified 2026-10-13

Why ranked: Its own site says: “Smartling connects your brand with customers around the globe.” We placed it 2nd of 5 on fit for this task. No free plan confirmed; paid from Usage-based (MT from $0.0075/word).

Fit 8.5 · value 6.9 · breadth 6 · availability 10 (how we score) · pricing source · site live

Rank 3

Lokalise

From $149Visit Lokalise (opens in a new tab)

Localization platform for software

Score 6.7/10Paid from: Explorer $149/moFree tier: no (trial)Last verified 2026-10-13

Why ranked: Its own site says: “Lokalise is a continuous localization and translation management platform.” We placed it 3rd of 5 on fit for this task. No free plan confirmed; paid from Explorer $149/mo.

Fit 7.0 · value 5.0 · breadth 6 · availability 10 (how we score) · pricing source · site live

SPONSORED Your tool here: paid placement is shown here, separate from the ranking, and never changes the order. Advertise

Rank 4

Phrase

UnverifiedVisit Phrase (opens in a new tab)

Translation management and localization

Score 5.9/10Paid from: UnverifiedFree tier: UnverifiedLast verified 2026-10-13

Why ranked: Its own site says: “Phrase is the AI-powered language intelligence platform for enterprise.” We placed it 4th of 5 on fit for this task. Pricing unverified.

Fit 5.5 · value 5.0 · breadth 6 · availability 10 (how we score) · no readable pricing page · site live

Rank 5

Crowdin

UnverifiedVisit Crowdin (opens in a new tab)

Localization management platform

Score 5.2/10Paid from: UnverifiedFree tier: UnverifiedLast verified 2026-10-13

Why ranked: Its own site says: “Crowdin is an all-in-one localization and translation management platform with all the software, tools and integrations you need to localize your content.” We placed it 5th of 5 on fit for this task. Pricing unverified.

Fit 4.0 · value 5.0 · breadth 6 · availability 10 (how we score) · no readable pricing page · site live

FAQ

What is the best AI tool to translation and localization?

By TaskRanking's published rubric, DeepL ranks first, followed by Smartling and Lokalise.

Is there a free AI tool to translation and localization?

Yes: DeepL has a free tier per its own pricing page (checked 2026-10-13).

How are these tools ranked?

Score = 50% fit, 25% value (from vendor pricing pages), 15% breadth, 10% availability. Sponsorship never affects rank.