In surveying the chatbotbuilding industry here are some reference points on the costs range for building chatbots
This is how much chatbot development agencies usually charge for the design, development, testing and training.
Chatbots that don’t require coding built using platforms like Chatfuel, Manychat and similar.
Chatfuel Facebook Messenger chatbots + Zapier. Still no coding, but a few Zapier integrations like Google Calendar, Google Drive, Google Forms, Google Sheets add some complexity.
Chatfuel chatbots + custom backend. A little bit of coding, usually bots like that are done in less then 1–2 weeks.
Chatbots with a more complex backend, often integrated with some existing systems and databases. Usually are done by a team of 2–3 people.
More advanced chatbots connected to a few third party integrations. Often used with CRMs and sales tools like Microsoft Dynamics CRM, ClickFunnels, HubSpot, MailChimp, Marketo, Infusionsoft and eCommerce platforms like Squarespace, WooCommerce, Magento, BigCommerce, Unbounce, Mailgun.
AI customer support and customer service chatbots. Usually, bots like that automate 20–50 frequently asked questions (FAQs). Used with sales and customer service tools like Intercom, Olark, Zendesk, Help Scout.
AI chatbots for small and mid-size enterprises that require a team of 4–6 team members. Projects like that take at least 2–3 months to implement and a chatbot always just a part of a bigger system, with custom dashboards, webviews, etc.