Shortlist by what you need
Start here if you know why you are leaving Zephyr AI.
Want the closest match?
Atomic AIMost similar to Zephyr AI in what it does, its category and its price.
Visit (opens Atomic AI in a new tab)Need a free plan?
JADBioHas a free plan, rated 3.9 out of 5. Zephyr AI has none.
Visit (opens JADBio in a new tab)Want the best rated?
Tempus AIRated 4.3 out of 5 in our review, against 4.0 for Zephyr AI.
Visit (opens Tempus AI in a new tab)
At a glance
Green means better than Zephyr AI, red means worse. Prices are starting prices per month.
| Tool | Our rating | Starts at | Free plan | Best for | Compare |
|---|---|---|---|---|---|
 Zephyr AIBaseline | 4.0 | Not listed | No | Precision medicine from real-world data, with interpretable models and no new assays. | |
| Atomic AI | 3.6−0.4 | Not listed | No | ATOM-1, a proprietary foundation model, predicts RNA structure and function more precisely than any prior approach - fused with real wet-lab assays to accelerate RNA-targeted drug discovery, published in Science. | vs Zephyr AI |
 Immunai | 4.0Same | Not listed | No | AI platform mapping the human immune system at single-cell resolution to accelerate drug discovery for pharma partners. | vs Zephyr AI |
 QuantHealth | 4.1+0.1 | Not listed | No | Clinical trial simulation platform for predicting patient response to therapies | vs Zephyr AI |
 Cradle | 3.8−0.2 | Not listed | No | AI models that retrain on every round of your wet-lab data to guide the next protein design cycle - claimed 2-12x faster development, and your data never trains models for anyone else. | vs Zephyr AI |
| JADBio | 3.9−0.1 | Free | YesZephyr AI has none | AutoML built specifically for biological and molecular data, aimed at biomarker discovery by researchers rather than data scientists. | vs Zephyr AI |
 Limbic | 4.2+0.2 | Not listed | No | Clinical AI for mental health providers, with published evidence behind it. | vs Zephyr AI |
| Tempus AI | 4.3+0.3 | Not listed | No | Publicly traded on Nasdaq, guiding to $1.6 billion in 2026 revenue | vs Zephyr AI |
 NetraMark | 3.8−0.2 | Not listed | No | NetraAI analyses clinical trial data to optimise trial design - finding optimal dosage, identifying ideal patient populations and increasing effect size. | vs Zephyr AI |
The alternatives in detail
In order of how closely each one matches Zephyr AI.
Atomic AI
3.6Not listed
vs Zephyr AI−0.4
ATOM-1, a proprietary foundation model, predicts RNA structure and function more precisely than any prior approach - fused with real wet-lab assays to accelerate RNA-targeted drug discovery, published in Science.
- Proprietary ATOM-1 foundation model for RNA structure/function prediction
- Integrated wet-lab assay validation cycle
- Focus on both small-molecule and RNA-based drug candidates
Named, real proprietary model with peer-reviewed validation
Not a self-serve product - a research/drug-development platform for pharma partners
Immunai
4.0Not listed
vs Zephyr AISame
AI platform mapping the human immune system at single-cell resolution to accelerate drug discovery for pharma partners.
- AMICA-OS platform built on single-cell multi-omic immune system data
- Target discovery tools for identifying new drug candidates from immune cell behavior
- Preclinical evaluation modeling for testing target hypotheses before trials
Dataset scale, built through partnerships with Fortune 100 pharma companies, gives its models depth smaller labs can't replicate
No published pricing; every engagement is a custom partnership negotiation
QuantHealth
4.1Not listed
vs Zephyr AI+0.1
Clinical trial simulation platform for predicting patient response to therapies.
- In-silico simulation of clinical trial outcomes
- Patient response prediction across therapy candidates
- Protocol testing before a trial is committed
Tests expensive protocol decisions before commitment
Credibility depends on retrospective validation in the same indication
Cradle
3.8Not listed
vs Zephyr AI−0.2
AI models that retrain on every round of your wet-lab data to guide the next protein design cycle - claimed 2-12x faster development, and your data never trains models for anyone else.
- AI protein candidate generation from desired properties
- Multi-property co-optimization (activity, binding, stability, expression, custom)
- Models retrain on every round of a customer's own wet-lab data
Structural data privacy - customer data never trains models for other customers
No published pricing - enterprise sales process only
JADBio
3.9Free
vs Zephyr AI−0.1Free plan
AutoML built specifically for biological and molecular data, aimed at biomarker discovery by researchers rather than data scientists.
- AutoML tuned for biological and molecular data
- Biomarker discovery workflows
- Survival analysis support
Handles omics data properties that break general AutoML tooling
A computationally discovered biomarker is a hypothesis, not a finding
Limbic
4.2Not listed
vs Zephyr AI+0.2
Clinical AI for mental health providers, with published evidence behind it.
- Clinical assessment support
- Built for providers and health plans
- Peer-reviewed evidence published in Nature Medicine
Carries published clinical evidence rather than testimonials
Pricing is not published and there is no individual route in
Tempus AI
4.3Not listed
vs Zephyr AI+0.3
Publicly traded on Nasdaq, guiding to $1.6 billion in 2026 revenue.
- Machine learning applied to genomic and clinical data for precision treatment matching
- One of the largest connected libraries of clinical and molecular data
- Publicly traded on Nasdaq under the ticker TEM
Publicly reported financials give unusual transparency into scale and growth
Pricing runs through insurance billing and enterprise agreements, not published rates
NetraMark
3.8Not listed
vs Zephyr AI−0.2
NetraAI analyses clinical trial data to optimise trial design - finding optimal dosage, identifying ideal patient populations and increasing effect size.
- NetraAI platform for clinical trial design optimisation
- Optimal dosage discovery from trial data
- Identification of ideal treatment populations
Targets the design decisions that determine whether a trial succeeds
No public pricing - enterprise pharma engagement
FAQ
Questions people ask
Is Zephyr AI free?
Zephyr AI does not list a free plan. Check its pricing page for current plans.
What is the best free alternative to Zephyr AI?
JADBio is the highest-rated alternative here with a free plan (3.9 out of 5).
How did you pick these alternatives?
We match tools on what they do, their category and their price, using the details in our directory. Ratings come from our reviews and reader reviews.