Evidently
Evidently is a local LLM + ML eval dashboard: you log traces or a dataset, then open charts (LLM-judged helpfulness, forbidden-words, sentiment).
OUR TAKE
Pick Evidently for ML / LLM teams who will run Evidently locally at $0 — not Arize first unless they want hosted Signal at $50. $0 is the library, not judge tokens.
Good fit
ML / LLM teams who will run Evidently locally at $0 — not Arize first unless they want hosted Signal at $50.
Poor fit
Evidently (open source)
USD, before tax · Checked 2026-10-27 · evidentlyai.com
OUR TAKE
Pick Evidently for ML / LLM teams who will run Evidently locally at $0 — not Arize first unless they want hosted Signal at $50. $0 is the library, not judge tokens. LLM-judged helpfulness still hits your model bill.
Good fit
ML / LLM teams who will run Evidently locally at $0 — not Arize first unless they want hosted Signal at $50.
Poor fit
Evidently (open source)
USD, before tax · Checked 2026-10-27 · evidentlyai.com
What it costs
USD, before tax · Checked 2026-10-27 · evidentlyai.com
Evidently (open source)
Apache 2.0. License fee . Local UI (evidently ui). You bring compute and judge-model keys
$0
Hosted Cloud
Not published by the vendor
Not published by the vendor
Checked 2026-10-27·evidentlyai.com
Before you pay
Good fit
ML / LLM teams who will run Evidently locally at $0 — not Arize first unless they want hosted Signal at $50.
Watch out
$0 is the library, not judge tokens. LLM-judged helpfulness still hits your model bill.
Instead, try
Phoenix if OTel traces + experiments when you want Phoenix $0 self-host; Arize if hosted Signal when you want AX Free $0 / Pro $50
Compare Evidently with
Limits, in full
- 01
$0 is the library, not judge tokens. LLM-judged helpfulness still hits your model bill.
- 02
No public Cloud $ on the page we opened. Quote only Apache $0.
- 03
A quality dashboard, not Arize’s Signal issues list. For that hosted see Arize.
If Evidently isn't it
Why: OTel traces + experiments when you want Phoenix $0 self-host.
Free· paid from$50/mo
ELv2, not ApacheChecked 2026-10-27·arize.com/pricing
vs Evidently
Why: hosted Signal when you want AX Free $0 / Pro $50.
Free· paid from$50/mo
Free Signal caps at 10 issues / month (account-wide, UTC)Checked 2026-10-23·arize.com/pricing
vs Evidently
Why: traces / evals you can self-host when you want Langfuse’s public Cloud $.
Free· paid from$2/mo
Hobby is two users and 30-day retentionChecked 2026-10-19·langfuse.com/pricing
vs EvidentlyLimits & alternatives3 limits · Phoenix, Arize, Langfuse instead
Limits, in full
- 01
$0 is the library, not judge tokens. LLM-judged helpfulness still hits your model bill.
- 02
No public Cloud $ on the page we opened. Quote only Apache $0.
- 03
A quality dashboard, not Arize’s Signal issues list. For that hosted see Arize.
If Evidently isn't it
Why: OTel traces + experiments when you want Phoenix $0 self-host.
Free· paid from$50/mo
ELv2, not ApacheChecked 2026-10-27·arize.com/pricing
vs EvidentlyWhy: hosted Signal when you want AX Free $0 / Pro $50.
Free· paid from$50/mo
Free Signal caps at 10 issues / month (account-wide, UTC)Checked 2026-10-23·arize.com/pricing
vs EvidentlyWhy: traces / evals you can self-host when you want Langfuse’s public Cloud $.
Free· paid from$2/mo
Hobby is two users and 30-day retentionChecked 2026-10-19·langfuse.com/pricing
vs Evidently