4 NSF to PST Converter Software Compared (2026): Features, Pricing & Performance

Software Comparison · 2026

Companies often migrate from IBM Lotus Notes to Microsoft Outlook as part of a transition to the Microsoft ecosystem. Unfortunately, the process isn't as simple as just copying the mailbox files, since IBM Lotus Notes stores data in NSF format, while Microsoft Outlook uses PST format. That's why there are many different options for NSF to PST conversion software, and it can be hard to know which one is the best choice for you.

To help you out, we evaluated a number of different NSF to PST conversion utilities, including their documentation, functionality, price, and ease of use. We then compared four of the most popular NSF to PST conversion software products based on their cost and capabilities to help you find the best NSF to PST conversion software for your needs.

Disclaimer: Both price and feature availability may change over time; therefore, make sure to check with the vendor directly to obtain current pricing and feature information before purchase.

Quick Comparison Table

Why You Need an NSF to PST Converter

Many companies move from Lotus Notes to Microsoft Outlook due to the seamless integration of Outlook with Microsoft 365, Exchange Server, Microsoft Teams and other Microsoft Services. When you do so, you will need some sort of conversion software because Outlook cannot read the NSF file types directly from Lotus Notes.

To be effective in performing an accurate conversion from NSF files to Outlook MSG, a good converter will do the following:

• Preserve the Original Hierarchical Structure of the Mailbox

• Maintain Original Email Formatting

• Maintain Original File Attachment

• Export Contacts and Calendar Entries

• Convert Large NSF databases

• Perform batch conversions with no data damage

The four products listed below will meet these fundamental informational requirements; however, they will be best suited for their own audience.

Tools in Detail

1.GainTools NSF to PST Converter

Budget-Friendly · Best for Individual Users & Small Businesses

GainTools low-cost, user-friendly, feature-rich migration software is designed for simplicity. The GainTools program is lightweight and easy to use, converting NSF files to PST files efficiently while maintaining your email folder structure and email properties.

Unlike enterprise-focused applications, many of which incorporate features that will never be used by the majority of their users, GainTools has developed a straightforward interface. Users can have their mailboxes migrated within a few clicks and without any prior experience.

Key Features

• Batch NSF conversion

• Convert Emails, Contacts, Calendars, Journals, Notes and Attachments

• Maintain your folder hierarchy

• Preserve your email metadata

• Convert to ANSI/PST or Unicode/PST files

• Optional mailbox selection for conversion

• View Mailbox before exporting

• Compatible with all Outlook Versions

• Imports large NSF Files

• Window Compatible

Pros

• Most Economical of All the Selected Tools

• Straightforward and Easy-to-Use Program Interface for New Users

• Fast NSF to PST Conversions

• Preserves the Integrity of Your Mailbox

• Lightweight Installation

• No Technical Skills Required to use the program

Cons

• No Direct Export to Office 365

• No Enterprise-Level Migration to Exchange

Best For: Users needing fast, Reliable, Affordable Conversion from Mall NSFs to PST Formats.

Ideal Audience: Home users, Freelancers, Students, and Business users looking for an affordable solution.

2 Shoviv NSF to PST Converter

Premium · Best for Enterprise Migration

Shoviv provides the highest amount of enterprise features when compared to other desktop conversion tools. In addition to being able to export to PST, IT administrators can migrate from Exchange Server directly to an Office 365 mailbox.

The software also supports batch processing of exports, date filtering, and incremental exports of data, along with folder mapping. All of these features make it suitable for organisations with large-scale migration requirements.

Key Features

• NSF to PST Conversion

• Office 365 Migration

• Live Exchange Migration

• Batch Mailbox Export

• Date Filtering

• Incremental Exporting

• Folder Mapping

• Preview

• Supports Encrypted NSF Files

• Maintains Metadata

Pros

• Great capabilities for enterprise-level migrations

• Support for Office 365

• Support for Exchange Migrations

• Designed for IT Administrators

• Works with very large mailbox databases

Cons

• Costs are higher

• More advanced interface than most personal users' needs

• Some may not need all features

Ideal for: Both large Enterprises migrating to Office 365 and deploying Office 365 Enterprise customers not on Microsoft's Hosted Exchange platforms.

3. SysTools NSF Export

Premium · Best for Large Organisations

SysTools has been a leading provider in the email migration sector for years. The NSF Export tool from SysTools aids the user in converting data between PST and other source email systems, such as Office 365 and Exchange, as well as through additional advanced options.

In addition to the conversion feature, the software has additional advanced functions for enterprise customers, including sophisticated filtering and reporting options, command line processing capabilities, and enterprise-wide deployment options.

Key Features

• NSF to PST conversion

• Export to Office 365

• Migrating from Exchange to PST

• Batch conversion

• Date Filtering

• Category Filtering

• Command Line Support

• Detailed migration reports

• Maintain Mailbox hierarchy

• Supports Large NSF Databases

Pros

• Full set of enterprise features

• Reliable migration engine

• Excellent filtering

• Reporting ability

• Good administrator tool

Cons

• Premium pricing

• Overkill for a single user

• Steep learning curve

Ideal for: Large Enterprises with Complex Migration Needs

4 Aryson NSF to PST Converter

Mid-Range · Best for IT Professionals

Aryson offers a good compromise between price and migration options. It supports more than PSTs for moving to the cloud as well, and has other filtering options.

It presents a relatively user-friendly experience for being a feature-rich conversion tool, particularly compared to the typical desktop converters.

Key Features

• NSF to PST conversion

• Batch processing

• Office 365 Integration

• Exporting from live exchanges

• Preview

• Filter by date range

• Keep original formatting of emails

• Support for encrypted NSF

• Folder hierarchy preserved

• Supports mailboxes greater than 100MB

Advantages

• Features offer a reasonable balance

• Can export to Office 365

• User-friendly interface

• Good performance

• Many options for output

Disadvantages

• Can be slow with very large mailboxes

• To take full advantage of premium features, you need to purchase higher editions of the software

Recommended for: IT professionals and medium-sized companies.

Pricing Comparison

GainTools NSF to PST

Budget-Friendly

5/5

Aryson NSF to PST

Mid-Range

4/5

Shoviv NSF to PST

Premium

4/5

SysTools NSF Export

Premium

4/5

Which Software Should You Choose?

Choose GainTools if:

• You need budget-friendly software

• You only need to know what the NSF to PST conversion is

• You want a user-friendly interface for new users

• You want fast conversion without unnecessary enterprise features

Choose Shoviv if:

• You are migrating to Office 365 directly

• You are using an Exchange Server within your organisation

• You need scheduling and enterprise migration capabilities

Choose SysTools if:

• You are managing enterprise-level migrations

• You require reporting and command-line support

• You require advanced filtering options

Choose Aryson if:

• You require additional Cloud Migration options

• You require Features beyond basic-level software

• You are managing medium size organization migrations

Final Verdict

Out of all these applications that allow you to convert NSF files into PST files, each of them is capable of performing basic conversions. But they help different types of users.

If your main concerns are low price, simple to use and quality, GainTools NSF to PST Converter will give you the best combination of all 3 features. It will offer everything you need if you are an individual or small business without having to pay for a large (enterprise-level) tool.

If your organisation has plans to move to Microsoft 365 or Exchange directly, you may want to consider Shoviv, SysTools, or Aryson, as they have more advanced functions and features, such as filtering and migrating to cloud services. While they all cost a little more than GainTools NSF to PST Converter, if you are doing a large mail migration, they will probably be worth it.

The correct way to choose which product to use for the migration ultimately depends on what you want to accomplish with your mail migration, the technical requirements, and your budget.

Frequently Asked Questions

1. Can all four NSF to PST converters perform batch conversion of multiple NSF files in one process?

Yes. All four of these NSF to PST converters allow for batch conversion of multiple NSF files in an individual process.

2. Do all four of these NSF to PST conversion tools preserve email messages, contacts, calendar events, and other attachments during conversion?

Yes. Each converter can recreate all of your major Lotus Notes mailbox items while still being true to their original folder structure and keeping track of their metadata.

3. Does the user need to have IBM Lotus Notes installed before using the NSF to PST conversion tools?

No, these tools can import and convert NSF files directly without requiring IBM Lotus Notes to be installed on the system beforehand.

4. Which NSF to PST converter is considered to provide the best value for a user's investment?

If you are only looking for accurate conversions from NSF files to PST files, then GainTools provides the best value since it delivers essential features required for migrating NSF files at a reasonable cost. However, users within larger businesses who need to migrate to Office 365 accounts or Exchange servers may experience better results and value with Shoviv, SysTools, or Aryson, which are significantly more expensive than GainTools products.

5. Do any of these NSF to PST conversion tools offer free trial versions?

Yes, all four vendors provide trial products so that users can evaluate their functionality and performance before making their purchasing decisions, although these trial products place limits on the number of items that a user can convert.