HubSpot

HubSpot offers tools to identify and merge duplicates rather than delete them.
On Professional and Enterprise plans, you can use the built-in duplicate management tool to review potential duplicate contacts and companies individually.

Once duplicates are identified, they can be merged: a merge combines two records into one, so the primary record retains all activities and associated data from both. This preserves history and relationships instead of losing data through deletion.

Note that a merge cannot be undone.

For advanced management, Operations Hub Professional/Enterprise offers the ability to automatically deduplicate in bulk and display thousands of possible duplicate pairs that can be merged with a few clicks. When importing, you can also prevent duplicates by using unique ID fields (e.g. Record ID or unique custom fields) as match criteria

Yes - if you have at least one Enterprise Hub, you can define custom objects in HubSpot CRM so that you can model your own data types in addition to standard objects (contacts, companies, deals, tickets, etc.).
However, there are some important caveats. Firstly, the name and labels of a custom object cannot be changed after creation, so it's critical to plan the taxonomy correctly before creating the object.

Additionally, custom objects don't come with all the out-of-the-box fields and features that standard objects have. For example, there is no automatic HubSpot Owner field or team assignment, and fields like "Last Activity Date" are not automatically updated - you have to add and maintain these yourself via workflows or code.
It also means that some integrations and no-code tools have limited support for custom objects (for example, Zapier historically didn't support HubSpot custom objects, requiring API-based integrations).

However, the latest version of HubSpot's Zapier integration has added support for custom objects. Bottom line: Custom objects offer great flexibility for experienced users, but require careful planning and often developer involvement to fully utilize.

Marketing Contacts are contacts you plan to target with marketing (e.g. newsletters, campaigns), while Non-marketing Contacts are contacts you want to have in your database without them receiving marketing material.

The difference is practical: Marketing Contacts can be used in HubSpot's marketing tools (emails, ads, etc.) and count towards your paid contact tier, whereas Non-marketing Contacts cannot receive marketing emails and do not count towards your billable contact tier.

This allows you to keep e.g. customers or inactive leads in the CRM at no extra cost by marking them as Non-marketing. You can change a contact's status at any time, and HubSpot allows up to 1 million non-marketing contacts in the system for free.

Advanced users can even automate status changes - for example, with a workflow that sets certain contacts to Non-marketing based on criteria to optimize costs.

What it does. HubSpot Sales Hub supports multi-currency for deals and offers. In the account settings, a Super Admin can add the desired currencies to the portal (in addition to the main currency). Then, for each deal, you can switch "Currency" to one of the added currencies so that the amount is recorded correctly in that currency.

HubSpot automatically saves an exchange rate to convert deal amounts to your main currency in reports - these rates can be updated by the admin or you can let HubSpot update them periodically.

When you create a quote (offer document) for a deal, the quote will also use the deal's currency. Note that pipeline forecasting and reporting can be displayed in the company's main currency using the stored rates (so you can compare performance across markets).
The multi-currency feature is available from the Professional level upwards.

Yes - HubSpot provides great opportunities to customize quote templates, especially on Sales Hub Professional and Enterprise. As a Super Admin, you can go to Settings → Objects → Offers and create a new offer template based on one of the three default templates. Without coding, you can change the logo, colors, fonts, add standard text (e.g. terms and conditions), insert company fields such as CVR number, hide or add columns in the product line table, etc. However, if you need to change something more drastic - such as unique design changes, additional modules or automatic calculation of discounts/fees - it requires developer help.

HubSpot CMS includes a quotes theme, and a developer can code a completely customized quote template using HubSpot's development tools. This gives full freedom to change the layout, module structure, and introduce advanced logic (e.g. sections for different product categories, special calculations of totals, etc.)

Please note that using a custom quote template requires a Sales Hub Pro or Enterprise subscription to be used for the actual quote creation. In short, experienced users can achieve a high degree of brand-customized quote submission in HubSpot - from simple visual adjustments to completely unique templates, depending on technical level.

How it works. With Service Hub Enterprise, you can create up to 25 separate knowledge bases - each with its own set of articles, language and domain (useful if you have multiple brands or product pillars). For multilingual needs, you can either have separate knowledge bases per language or you can create multi-language articles within the same knowledge base.

HubSpot lets you add translated versions of a given knowledge base article and connect them so the user can switch languages - similar to how multilingual websites work. There is also the option to make a knowledge base (or individual categories/articles) "private", meaning that only logged-in users with permission can view the content.

This is useful for internal knowledge bases or partner portals. In terms of capacity, HubSpot's knowledge base system supports around 10,000 articles per knowledge base, which is usually plenty even for experienced support teams. So yes - for experienced users with global or internal knowledge sharing needs, HubSpot provides flexibility for both multi-language and access-restricted knowledge base content.