Which is better, Z-Discovery or Onna?

Z-Discovery edges out Onna based on user ratings across 93 reviews. That said, the best pick depends on your workflow — Onna may be a stronger fit for specific team sizes or use cases. Review the full comparison to decide.

What are the main differences between Z-Discovery and Onna?

Key differences between Z-Discovery and Onna include free trial availability (Onna offers one, Z-Discovery does not). Use the Spotsaas comparison table to evaluate each dimension before deciding.

Do both Z-Discovery and Onna offer a Free trial?

Onna offers Free Trial, but Z-Discovery does not.

Who are the typical users of Z-Discovery?

Z-Discovery is designed for Large Enterprises, Medium Business.

Who are the typical users of Onna?

Onna is designed for Large Enterprises, Medium Business, Small Business.

What is the starting price of Z-Discovery and Onna?

Pricing details for both Z-Discovery and Onna are unavailable.

What are the best alternatives to Z-Discovery?

Some top alternatives to Z-Discovery include Relativity, Cavo eD, Catalyst Insight, Exterro, eDiscovery Point.

What are the best alternatives to Onna?

Some top alternatives to Onna include Logikcull, Relativity, CasePoint, Cavo eD, Catalyst Insight.

Z-Discovery vs Onna Comparison

Last updated: May 21, 2026

Z-Discovery

4.4(93 reviews)

Starting at Contact for pricing

Large Enterprises
Medium Business

The Z-DISCOVERY is an eDiscovery application offers robust functionality available. Built for a small office or to handle unlimited data, it is completely scalable and provides control over searchable documents, metadata…

View Pricing Read Reviews

Onna

4.0(1 reviews)

Starting at Contact for pricing

Free Trial
Large Enterprises
Medium Business

Onna's powerful eDiscovery software makes it easy to sort and pinpoint relevant information from large data sets. The platform is used by law firms, corporations, government agencies, and educational institutions to mana…

View Pricing Read Reviews

Z-Discovery leads on user satisfaction with a 4.4-star rating across 93 reviews.

SpotSaaS Analysis

Z-DiscoveryOnna

Z-Discovery excels in scalable eDiscovery with a focus on legal hold and user-friendliness, making it ideal for companies managing large data volumes. Onna, on the other hand, is tailored for legal teams that prioritize advanced data integration and analytical capabilities across diverse sources.

- Best for scalable eDiscovery - Strong legal hold features - Intuitive user interface - Suitable for medium to large companies - Efficient data volume management - Ideal for legal and compliance teams

- Best for advanced eDiscovery - Strong data integration capabilities - Comprehensive search functionalities - In-depth data analysis tools - Ideal for medium to large enterprises - Focused on diverse data sources

Z-Discovery vs Onna — at a glance

Feature	Z-Discovery	Onna
Rating	4.4 / 5	4.0 / 5
Reviews	93	1
Starting price	Contact for pricing	Contact for pricing
Free trial	No	Yes
Free version	No	No
Best for	Large Enterprises, Medium Business	Large Enterprises, Medium Business, Small Business
Category	eDiscovery Software	eDiscovery Software
Platforms	SaaS/Web/Cloud	SaaS/Web/Cloud, Installed - Windows, Installed - Mac
API	Available	Available
Support modes	24/7 (Live rep), Business Hours	Business Hours, Online
Certifications	—	SOC 2, HIPAA, GDPR, ISO 27001
Data residency	US	US

Key differences between Z-Discovery and Onna

Free trial: Onna offers a free trial; Z-Discovery does not.
User satisfaction: Z-Discovery scores higher with a 4.4-star average.
Deployment: Z-Discovery supports SaaS/Web/Cloud; Onna supports SaaS/Web/Cloud, Installed - Windows, Installed - Mac.

Z-Discovery vs Onna — find the better fit before you commit.

Which tool fits your team best

Which is actually cheaper for your team size

Where each product wins, per real buyers

Most eDiscovery Software tools look identical on paper. This comparison cuts to the differences that matter — pricing structure, team fit, and what real buyers found after signing up.

Biggest differences

Features

Pricing

Buying details

Security

Buyer feedback

Integrations

Product tour

Other options

	Z-Discovery (87) Talk to an expert Talk to an expert	Onna (17) Talk to an expert Talk to an expert

Biggest differences

Affiliate Disclosure

Start here before you go deeper into features.

Z-Discovery

Best for scalable eDiscovery with strong legal hold and support.

Choose if

You need to manage large or unlimited data volumes efficiently.
Your legal or compliance team requires an intuitive, easy-to-use interface.
You value responsive customer support and collaborative feature development.

Consider alternatives if

Your team demands highly flexible and customizable reporting options.
You require seamless integration with tools like Outlook or advanced interview modules.

Onna

Best for legal teams needing advanced eDiscovery with strong data integration.

Choose if

You require comprehensive data integration from multiple diverse sources.
Your team needs advanced search and in-depth data analysis capabilities.
Data security and regulatory compliance are top priorities for your organization.

Consider alternatives if

Your team lacks dedicated support to onboard and manage complex features.
You need extensive third-party app integrations beyond Onna’s limited marketplace.

Z-Discovery: Best for scalable eDiscovery with strong legal hold and support. Onna: Best for legal teams needing advanced eDiscovery with strong data integration.

Description	The Z-DISCOVERY is an eDiscovery application offers robust functionality available. Built for a small office or to handle unlimited data, it is completely scalable and provides control over ... Read More about Z-Discovery	Onna's powerful eDiscovery software makes it easy to sort and pinpoint relevant information from large data sets. The platform is used by law firms, corporations, government agencies, and ... Read More about Onna
Free Trial Availability	No free trial	Free Trial available
Spotsaas Score What's this? ↗	8.0/10	8.3/10
User Ratings Based on verified Spotsaas reviews	4.4 (93)	4 (1)
Best Company Size	51-500 employees500+ employees	Medium BusinessLarge Enterprises
	Get pricing help	Get pricing help

Software Demo

Demo	Z-Discovery has not given any software demo yet If you're the owner of this profile, add your demo.Contact us

Need a second opinion?

Get shortlist help from a software advisor

Share your priorities, budget, and team needs, and we’ll help you narrow the options and understand the tradeoffs before you talk to vendors.

How do Z-Discovery and Onna Compare on Features?

Total Features	6 Features	7 Features
Unique Features	No unique features	No unique features
	Get Quote	Get Quote

Compare Z-Discovery and Onna on pricing

Review starting price, plan structure, and free-trial access side by side so you can see which option fits your budget and buying process.

Pricing Option
Pricing Plans	Not Available	Not Available
Pricing Page		Pricing information not available
	View detailed pricing	View detailed pricing

Other Details

Organization Types supported	Small Business Freelancers Medium Business Large Enterprises	Small Business Freelancers Medium Business Large Enterprises
Platforms Supported	Mobile - iOS Browser Based (Cloud) Mobile - Android Installed - Mac Installed - Windows	Mobile - iOS Browser Based (Cloud) Mobile - Android Installed - Mac Installed - Windows
Modes of support	24/7 (Live rep) Business Hours Online	24/7 (Live rep) Business Hours Online
API Support	Available	Available
	Get help choosing	Get help choosing

Security & Compliance

Certifications, data handling, and security controls for IT and compliance evaluators.

SOC 2	—	✓ Yes
HIPAA	—	✓ Yes
GDPR	—	✓ Yes
ISO 27001	—	✓ Yes
Single Sign-On (SSO)	—	✓ Yes
Multi-Factor Auth (MFA)	—	✓ Yes
Data Encryption	—	✓ Yes
Audit Logs	—	✓ Yes
Data Residency	🇺🇸 US	🇺🇸 US

Z-Discovery User Reviews & Rating Comparison

User Ratings	4.4 (based on 93 reviews)	4 (based on 1 reviews)
Rating Distribution	61 22 4 0 0	7 9 1 0 0
Spotsaas Editor’s POV generated by AI	Buyer sentiment Users generally praise Z-Discovery for its efficient legal hold process, strong customer support, and intuitive UI, though some find certain features clunky and desire more flexible reporting. What buyers like Ease of use Customer support Legal hold efficiency Common complaints Feature clunkiness Limited reporting flexibility	Buyer sentiment Users generally appreciate Onna's powerful data integration and search capabilities, though some find the feature set complex and the marketplace limited. What buyers like Ease of use Advanced search functionality Data security and compliance Common complaints Complexity for new users Limited app marketplace
Pros and Cons	Streamlined legal hold process that saves time Excellent customer support and responsiveness Intuitive and easy-to-use web user interface Some features like the interview module can be clunky Limited flexibility and missing columns in report options	Comprehensive data integration across multiple sources Advanced search and in-depth data analysis capabilities Strong focus on data security and regulatory compliance Complexity of features can overwhelm new users without support Limited marketplace for additional apps and connectors
Positive Reviews	No reviews available for the product	No reviews available for the product
	Read reviews	Read reviews

Media and Screenshots

Screenshots	20 Screenshots	7 Screenshots
Videos	No videos available.	3 Videos

Top Alternatives to Z-Discovery and Onna in 2026

Alternatives	Relativity 4.5 Cavo eD Catalyst Insight 2.8	Logikcull 4.8 Relativity 4.5 CasePoint 5

Frequently asked questions

Which is better, Z-Discovery or Onna?: Z-Discovery edges out the other on user ratings (4.4 vs 4.0). That said, the best pick depends on your use case — use the comparison tables above to evaluate each dimension.
Do Z-Discovery and Onna offer a free trial?: Onna offers a free trial. Z-Discovery does not.
What is the starting price of Z-Discovery vs Onna?: Z-Discovery starts at Contact for pricing. Onna starts at Contact for pricing.
What are the top alternatives to Z-Discovery?: Top alternatives to Z-Discovery include Relativity, Cavo eD, Catalyst Insight, Exterro, eDiscovery Point.
What are the top alternatives to Onna?: Top alternatives to Onna include Logikcull, Relativity, CasePoint, Cavo eD, Catalyst Insight.

Z-Discovery vs Onna Comparison

Z-Discovery

Onna

Z-Discovery vs Onna — at a glance

Key differences between Z-Discovery and Onna

Z-Discovery vs Onna — find the better fit before you commit.

Z-Discovery

Onna

Biggest differences

Description

Free Trial Availability

Spotsaas Score

User Ratings

Best Company Size

Software Demo

Demo

Get shortlist help from a software advisor

How do Z-Discovery and Onna Compare on Features?

Compare Z-Discovery and Onna on pricing

Other Details

Organization Types supported

Platforms Supported

Modes of support

API Support

Security & Compliance

Z-Discovery User Reviews & Rating Comparison

Media and Screenshots

Screenshots

Videos

Top Alternatives to Z-Discovery and Onna in 2026

Related Blogs and Articles for Ediscovery Software

Frequently asked questions